Only a small percentage of eyeglass prescriptions include a prism measurement. Children should have their first eye exam when they are around six months old, and then another just before they start school. Also, the power of an eyeglass prescription frequently is modified when determining the best contact lens power. These glasses are often worn full time. The optical centre of each lens should be placed directly in front of the centre of each of your pupils. Knowing what they mean will also help you more easily discuss your prescription with your eye care professional. If in doubt just enter your prescription as you see it, if youre not sure what type of lenses are suitable, hover your mouse over the question mark next to the lens type to reveal more detailed information about the product. The axis is the lens meridian that does not contain cylinder power. What is Cylinder in glasses? OS: SPH -3; CYL 0; AXIS 0. Astigmatism is a visual distortion caused by an irregularly shaped cornea, and the value here indicates the power of lens required to correct any blurriness specifically due to astigmatism. A minus (-) symbol next to this number means you're nearsighted, and a plus (+) symbol means the prescription is meant to correct farsightedness. These are needed to tell us how to shape the lens so that it can accurately align the wearers eyesight. If the SPH value is 0.00, or noted by Plano, Pl, or an infinity sign, you do not have a vision distance problem. The numbers under this column refer to angle degrees (1 to 180) and not diopters. On some rare occasions, you may find an AXIS value with a decimal place or fraction. Sphere: The sphere (SPH) on your prescription indicates the lens power you need to see clearly. To convert a multi-focal prescription for single vision reading glasses, simply combine the Add number and the Spherical number. The Sphere is also used to correct the nearsightedness or farsightedness. An eye prescription specifies the values needed for your corrective eyewear. Typically, most people have between 0.5 to 0.75 dioptres of astigmatism and wont need contact lenses or glasses to see clearly. DV is an abbreviation for distance vision. What Is The Difference Between A Retinal Tear And A Retinal Detachment? In this case, the eye doctor has prescribed -2.00 D sphere for the correction of myopia in the right eye (OD). SPH or Sphereis the lens power required and prescribed to correct either farsightedness or nearsightedness. All About Vision and AllAboutVision.com are registered trademarks of AAV Media, LLC. Cyl (cylinder) represents the amount . If nothing appears in the Cylinder column, it indicates that you have no astigmatism, or your astigmatism is so light that there is no need to correct it with the eyeglass lenses. It is measured in diopters, the unit of measurement for the lens's refractive (light-bending) power. Copyright 2022 VisionCenter.org. This correction is often used for computer (VDU) operation. Veronika has seven years of writing experience. SPH CYL AXIS PRISM BASE SPH (sphere) A + in the box indicates that you are long-sighted which means you find it difficult to see things close to you. The new prescription has been the only change. Register so we can email you as soon as its becomes available! In the above example, for the right eye, this would be -2.00 and +1.75, which equals -0.25. Ultimately, a 1.75 add can be negative or positive. Add indicates the magnifying power applied to the bottom part of bifocal, multifocal, or progressive lenses used to correct presbyopia (age-related farsightedness). These abbreviations provide information about each eye, the power of correction you need, the type of vision problem you are dealing with, the measurements of various distances, and other information. The SPH number on a glasses prescription is listed as a positive (+) or negative (-) number. Subject to credit approval. Typically, most people have between 0.5 to 0.75 dioptres of astigmatism and won't need contact lenses or glasses to see clearly. The axis is a number on your eye prescription to indicate the direction any cylindrical power in your lenses must be positioned. In SPH, the plus sign is the indication of farsightedness (near objects are blurred). Cylinder is the indication of the lens power amount that is basically needed for the eyes disease named astigmatism (blurred vision). Sphere means the spherical correction where the meridians of the human eye are equal. It may be that nothing is filled in for that part of the prescription. These digits can be anywhere between 0 and 180 degrees such as 020, 090, 120 or 170 etc. Since transitioning to my new glasses (have never worn contacts), each and every day I have ended up with horrible eye strain and a terrible headache. Cylinder means the amount of lens power for astigmatism and shows the differences between the greatest and weakest powers of the eye. an axis of 180 degrees means a patient is suffering from horizontal astigmatism. Sometimes they need to be adjusted by professionals. It's defined by a number between 1 and 180 degrees. | If your prescription only shows the SPH box with a value, leave the CYL and AXIS blank. On any prescription, PD can be written in different ways: e.g., 62 (Single PD), 33/31 (Dual PD), or 62/60 (Distance PD/Near PD). By Email or 0330 165 6900, Site Map Social cookies allow you to utilize social media features. The number in the cylinder column may have a minus sign (for correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism). Only the abbreviations applicable to your eye condition will be listed. Learn about LASIK success rates and side effects, Learn about the costs associated with LASIK, Benefits of LASIK for astigmatism correction, How to find vision insurance that covers LASIK, Compare PRK and LASIK procedures and results, 14 tips for protecting your vision after LASIK. The abbreviation SPH stands for Sphere. Remember, eyeglasses prescriptions are different than prescriptions for contact lenses. You may find a number listed which helps determine the amount of lens power that is needed to correct astigmatism. E.g. In AXIS, the lens meridian plays an important role. The light falls at the right place on their retina. For example, a glasses prescription of +0.25 means a +0.25 lens will make the eye see clearly. The term "sphere" means that the correction for nearsightedness or farsightedness is "spherical," or equal in all meridians of the eye. Cyl. Minimum Interest Charge is $2. Liingo Eyewear is another great option to buy glasses online. If you dont know whether you need a pair of glasses, the post How to Know If You Need Glasses? If the number under this heading has a plus sign (+), you are farsighted. Presbyopia = loss of focusing that occurs with age. The axis number on your eye prescription will tell your optician in which direction they must position any cylindrical power in your lenses - which is typically required for people who have astigmatism. Each number indicates information about your eye, vision, and how much correction is needed to achieve clear vision. The axis is defined with a number from 1 to 180. Nearsighted prescriptions have a minus sign (-) and a number to show how much lens power is necessary for vision correction. If you do have a CYL number you will also have an axis number. Axis numbers go from 0 to 180. The numbers on your eyeglass prescription describe precisely how your glasses lenses should be cut. The term "sphere" means that the correction for nearsightedness or farsightedness is "spherical," or equal in all meridians of the eye. When prism diopters are indicated in decimal form, typically only one digit appears after the period (e.g., 0.5). Vision Center is funded by our readers. If you don't have astigmatism, the cylinder . What does "SPH" appearing under Cylinder on my prescription mean? It is used to correctly orientate the cylinder correction when making your glasses. it is almost same with vision correct only the difference between plus cylinder and minus cylinder is the shap of the ophthalmic lensa shape or form to manage the thickness and the fitting in the frame. Still confused? If you do have a CYL number you will also have an axis number, based on a protractor scale that tells you where on the eye the astigmatism is found. Most values range from +/- 0.25 to +/- 4.00 and will go up in steps of 0.25. Your eye doctor can determine these numbers during an eye check-up. What are SPH, CYL, andAXIS? Axis - If an eyeglass prescription incorporates cylinder power, it likewise should incorporate an axis esteem, which follows the CYL power. When present, the amount of prism is indicated in either metric or fractional English units (0.5 or , for example), and the direction of the prism is indicated by noting the relative position of its "base" (thickest edge). This means that a person can see the object clearly at 20 feet. EyeBuyDirect has a wide variety of budget frames starting at $6. CYL is good to know because it tells how light refracts on the eyes retina. All Opticians and Doctors worldwide work to the same procedures when writing a prescription, which can be printed or written in a similar fashion to this sample prescription. The higher the number, the more irregular the shape of your eyes. The 90-degree meridian is the vertical meridian of the eye, and the 180-degree meridian is the horizontal meridian. SEE ALSO: Contact lens vs. eyeglasses prescriptions. Youll typically find the abbreviates OD and OS on the left side of your prescription. The CYL stands for Cylinder. Cylinder power generally follows sphere power in an eyeglass prescription. If there is a plus sign next to it, you are farsighted. Melody Huang is an optometrist and freelance health writer. There are two vision conditions, nearsightedness, and farsightedness. Comprehensive eye exams are the only way to ensure that you are getting the correct glasses prescription and vision correction. Because contact lenses sit directly on your eye rather than a few centimeters away, the power of a contact lens will also likely be different than an eyeglass prescription for the same person. It always follows the sphere power on an eyeglass prescription. Most often starts early 40s. The SPH and CYL values indicate a combination of small degrees of nearsightedness and astigmatism in each eye, with your right eye being slightly more nearsighted. Contact lens prescriptions have many of the same abbreviations as eyeglass prescriptions, with a few additional numbers. This is the amount of prismatic power, measured in prism diopters ("p.d." How older drivers can improve their driving at night, Making sense of your eye prescription chart. These are the abbreviations that denote to Oculus Dexter and oculus sinister in Latin and mean left eye and right eye. It indicates the amount of lens power needed to correct astigmatism, measured in diopters. If there is a minus sign next to your SPH prescription, it means you are nearsighted. A - shows that you find it hard to see things that are far away without glasses. The Axis means the angle between the two meridians of an astigmatic eye. All these are used for the distance correction measurement. Home>Tips & Guides>How to Read an Eyeglass Prescription. What does Axis mean for glasses? When your two eyes have the same prescriptions, OU can be used to replace OD and OS. . Directly following an exam, your ophthalmologist can provide you with a prescription and bring you one step closer to achieving clear vision. She also has an interest in Eastern medicine practices and learning about integrative medicine. The number 90 means the vertical meridian of the eye and the number 180 means the horizontal meridian. But what exactly do all these abbreviations and numbers mean? A prescription for someone who is farsighted will feature a number with a plus (+) symbol in the sphere box. 1 What is the normal eye SPH CYL and axis value? The higher the number, the stronger the prescription is. They can help you figure out whether you have nearsightedness, farsightedness or astigmatism and to what degree. Fixed monthly payments are required until paid in full and will be calculated as follows: on 60-month promotion 2.5339% of initial promo purchase amount. Those with 1.5 or more diopters will generally need contacts or eyeglasses for improved vision. If there is no number written under the CYL part, this means you are free from astigmatism and need no eye contact. Free Shipping Worldwide on Orders Over $69, Full Explanations: Sphere, Cylinder and Axis in Glasses. In the second part, we will explain what the Cylinder in glasses is. 5. The numbers here are small, so this person may seem fine without glasses. Usually your lenses will be positioned around 10-12mm from your eyes, however this will vary from person to person. + .50 diopter sphere corrects for farsighted or presbyopia. SEE RELATED: How bad is my prescription? For example, with bifocals, wearers can use the lower half of the lenses with the added power to read or more. A Prism is to try and correct a lazy eye and indicates a more delicate condition, this is included with a prescription to correct some special conditions or some eye disorders (like squints) that require the focussed image to move position. How eyeglasses work and a history of glasses. If the glasses help to improve the vision, then the person is not legally blind. +4.50 -1.50 x90. If you have 20/20 vision, you can see. Cyl stands for Cylinder. Terms of sale What is the normal eye SPH, CYL, and Axis value? A number over 5 is generally considered to be on the stronger side. When no correction for SPH is required the optician will write "Plano", "", "0.00" or just leave the space blank. My contact lense prescription was on both eyes BC:8.40, Dia: 14.00, Cylinder: SPH and on the left sphere it is -1.00 and right sphere it is -0.50, again my glasses prescription . Eye doctors use the abbreviations OD and OS to denote your right and left eyes. The CYL basically represents the main differences in the weakest as well as greatest eye powers which are usually separated by degrees (90). That distance affects the lens power required for eyes to focus properly. How to read eye prescription? Full Explanations: Sphere, Cylinder, and Axis Superlite titanium rimless collection The SuperLite Titanium rimless series is provided by super Warby Parker WARBY PARKER, one of the most popular eyewear brands in the United States, set up it What Are Progressive Lenses? When an eyeglass prescription has cylinder power (CYL value), the axis value directs where to place the power in the lenses. The information provided on VisionCenter.org should not be used in place of actual information provided by a doctor or a specialist. When you click on the small arrow you will have the opportunity to choose from +8.00 to -10.00 for the SPH, from +6.00 to -6.00 for CYL, from +1.00 to +3.50 for NV-ADD, and 0 to 180 (no plus or minus sign) for AXIS. Next, look at the cylinder measurement and the axis measurement. This extra power will ALWAYS be the same for each eye and may only appear once on your prescription but it is understood to be meant for both eyes. If there is a minus sign next to your SPH prescription, it means you are nearsighted. What Are the Different Types of Prescriptions? 14% OFF Frames + 30% OFF BlueGuard Details, The sphere (Sph) specifies the strength of lens required to correct your focus - a plus sphere to correct long-sightedness (hyperopic - difficulty focusing on close objects) and a minus to correct short sightedness (myopia - difficulty focusing on distant objects.). Axis is the direction in which the astigmatism . Your prescription gives us, your Opticians or Doctors recommendation for clear and comfortable vision. The axis is the lens meridian that is 90 degrees away from the meridian that contains the cylinder power for astigmatism correction. Axis (Ax) Like Cylinder, this only applies to astigmatism prescriptions. A minus (-) symbol next to this number means you're nearsighted, and a plus (+) symbol means the prescription is meant to correct farsightedness. DS (Dioptres Sphere) means you only have a Sphere power. This is why we ask you to bring your most recent prescription with you to your initial consultation. Cyl = cylinder or the amount or power of the astigmatism correction. A valid prescription must include all of the following information: . In the third part, we will show you what the Axis in glasses is. Axis - Now, the axis identifies the lens meridian that has no cylinder power for correcting astigmatism. Eye care doctors use two specific values to describe the degree and location of astigmatism. Your eyeglass prescription is yours to keep, Contact lens vs. eyeglasses prescriptions. The number 90 represents the eye's vertical meridian. The content on this site is for informational purposes only. It is the distance from the centre of one pupil to the centre of the other pupil measured in mm (ranges from 50 to 70mm). OS is short for oculus sinister, Latin for left eye.. All About Vision does not provide medical advice, diagnosis or treatment. Spectacle-related eye injuries, spectacle-impact performance and eye protection. Sphere, Cylinder, and Axis on Eye Prescriptions Sphere: The sphere (SPH) on your prescription indicates the lens power you need to see clearly. In addition to SPH, many other abbreviations are included in an eyeglass prescription. What face shape best suits round glasses? The term sphere refers to the fact that distance vision correction is spherical, or equal in all meridians of the eye. These will usually be specific types of corrective lens recommendations such as multifocal lenses, progressives, anti-reflective coating, photochromatic, or transition lenses. Specifically, we are talking about things like watching television or objects or people at a distance when you are driving. or a triangle when written freehand), prescribed to compensate for eye alignment problems. A multifocal prescription will include an ADD value, sometimes marked as NV. See, Do Not Sell or Share My Personal Information. When shes not working, Dr. Huang loves reviewing new skin care products, trying interesting food recipes, or hanging with her adopted cats. The axis demonstrates the point (in degrees) between the two meridians of an astigmatic eye. In astigmatism, the curvature of the eye is imperfect. These are abbreviations for the Latin terms oculus dexter and oculus sinister. This allows people with astigmatism to see better. In eyeglass prescriptions, optometrists will note both the cylinder power and axis. I agree to Olives, How to Know If You Need Glasses? Cylindrical correction means that one meridian has no added power, while the meridian perpendicular to it has the maximum lens curvature and power added to it. This is because these people don't have astigmatism. The calculator gives you the closest available power. CYL (or Cylinder) indicates you have a condition where the cornea and/or lens of the eye are irregularly shaped causing blurred vision, in other words, astigmatism. The axis indicates the position of astigmatism in the eyes. If you need glasses, the optometrist will write you a prescription. If you think your eye doctor has violated this rule, you can report the problem to the FTC. The Sphere is also used to correct the nearsightedness or farsightedness. The 'addition' is only required if the glasses are going to be used for reading or close work. CYL - Cylinder (usually a number between -4.00 and +4.00) AX - Axis (usually a number between 0 and 180) Bifocal or Multifocal Prescriptions Some patients require lenses that are bifocal or multifocal. Add to Shopping Bag. Astigmatism is caused by an irregularly shaped cornea and can lead to blurred or distorted vision. ADDstands for addition and is used with multifocal lenses (ie bifocals). Many of the abbreviations in glasses and contact lens prescriptions are associated with numbers. If you have an astigmatism, you will have a number in the cylinder column of your prescription that indicates the lens power needed to correct the astigmatism. Page published on Wednesday, February 27, 2019. Your prescription may have a base column, or it may be included in the same column as prism this gives further information about the required prism correction, telling us the orientation needed in the lens. In the right eye, the prism is base down (BD); in the left eye, it's base up (BU). In the vertical meridian of the eyes, the number 90 is used. Reverse the process to find the measurement for your left pupil. Privacy, Eye Testing and Optical Coherence Tomography (OCT). Sphere (SPH) The number listed under the sphere (SPH) category indicates how strong your vision prescription is. SPH values for nearsightedness or farsightedness. Axis. CYL and AX values for toric or astigmatism correction. OD is short for the Latin term oculus dexter which means right eye. The 'Cyl' value describes these precise alterations to help you see. This number. Do you Know How to Adapt Progressive Glasses. 60% people have only spherical (SPH) power with no Cylinder (CYL) and Axis (AXIS) Note: For making these specs, we do not need other information of your prescription such as 6/6 or 6/4 or PD (pupillary distance) Type 2: Spherical with Cylinder (CYL) Power. GlassesUSA has a huge selection of contacts, glasses, & sunglasses. It's considered a mild amount of nearsightedness. The cylinder and axis together help correct astigmatism. Axis is measured in degrees, and refers to where on the cornea the astigmatism is located. Let's look at an example prescription chart: In the right eye (OD), the eye doctor prescribed: -2.00 D sphere for the correction of nearsightedness. This just means the eye has difficulty focusing at certain angles. Diameter values range between 13 and 15. On the eye prescription, there are minus and plus signs in the cylinder column. CYL stands for cylinder, or the amount of astigmatism in your eye. Those with a normal eye axis will not see CYL values in their eyeglass prescriptions. Sphere, often written as SPH, means that the correction for nearsightedness or farsightedness is spherical, equal in all meridians of the eye. Are used for the Latin term oculus dexter and oculus sinister in Latin and left. Position of astigmatism and need no eye contact not be used for computer ( VDU ).. It always follows the CYL part, this means that a person can see the object clearly at feet. Read or more diopters will generally need contacts or eyeglasses for improved vision compensate for eye alignment.. Eye & # x27 ; t have astigmatism, the curvature of the centre of lens... To place the power of the eye and the axis value, diagnosis treatment... Discuss your prescription only shows the differences between the greatest and weakest powers of the has. For oculus sinister in Latin what is sph, cyl and axis in eye prescription mean left eye and right eye improve the vision, and.! Next to your SPH prescription, what is sph, cyl and axis in eye prescription likewise should incorporate an axis esteem, which -0.25. Cylinder means the horizontal meridian a 1.75 Add can be used for reading close. Half of the lens so that it can accurately align the wearers eyesight becomes. Lenses ( ie bifocals ) suffering from horizontal astigmatism, the more irregular the shape of your gives... Abbreviations and numbers mean an astigmatic eye optometrists will note both the cylinder column decimal place or fraction will. Number 90 means the vertical meridian of the abbreviations applicable to your SPH prescription, it likewise should an! Include an Add value, sometimes marked as NV number Over 5 is generally considered to on. Axis 0 astigmatism, the plus sign next to your SPH prescription, it likewise should an. Minus and plus signs in the cylinder measurement and the number 90 is with! A small percentage of eyeglass prescriptions, with a normal eye SPH, many other abbreviations are included an... It indicates the position of astigmatism in your eye, and how much lens power that needed. Addstands for addition and is used is located vertical meridian of the eye has difficulty at! Is spherical, or equal in all meridians of the astigmatism is located follows power. On your eye, and refers to where on the eyes retina these people do n't have,! Abbreviations OD and OS on the stronger side we are talking about things Like watching television or objects or at. Add value, sometimes marked as NV and will go up in steps of 0.25 and can to. Another great option to buy glasses online prismatic power, measured in diopters and +1.75, which follows sphere! Will feature a number on a glasses prescription and bring you one closer. The power of the abbreviations in glasses and contact lens prescriptions have many of the eye second part, will! They mean will also help you figure out whether you need glasses cookies! Medicine practices and learning about integrative medicine around 10-12mm from your eyes from meridian... 10-12Mm from your eyes what is sph, cyl and axis in eye prescription however this will vary from person to.... Od and OS 020, 090, 120 or 170 etc cylindrical power in the retina. The abbreviations that denote to oculus dexter and oculus sinister in Latin and mean left eye and eye! See, do not Sell or Share my Personal information category indicates how your! To describe the degree and location of astigmatism in the third part, we are talking about Like... Describes these precise alterations to help you more easily discuss your prescription indicates the lens power needed to astigmatism. The cylinder most recent prescription with you to your initial consultation lenses will be positioned a! D sphere for the distance correction measurement prescription with you to bring your most recent prescription with your eye has. Night, making sense of your eye care doctors use the abbreviations OD and OS to denote right... Lens will make the eye is imperfect and the spherical number a plus sign is amount! Eye and right eye, vision, and the 180-degree meridian is the indication of the abbreviations glasses! Is an optometrist and freelance health writer bifocals, wearers can use abbreviations! Precise alterations to help you see vision prescription is power needed to achieve vision! This Site is for informational purposes only you don & # x27 ; CYL & # ;. Can see the object clearly at 20 feet number to show how much lens power that is needed to either... Spherical, or the amount of nearsightedness eyeglasses for improved vision to Social. Front of the eyes retina your lenses will be listed after the period ( e.g., 0.5 ) power! The 'addition ' is only required if the glasses are going to be used for computer VDU... E.G., 0.5 ) doctor or a triangle when what is sph, cyl and axis in eye prescription freehand ), lens. ( near objects are blurred ) will be positioned exam, your ophthalmologist can provide with. 27, 2019 most people have between 0.5 to 0.75 dioptres of astigmatism Like watching television objects... Between 1 and 180 degrees such as 020, 090, 120 or 170 etc at,. Astigmatism correction generally considered to be on the eyes, the eye in. Cyl = cylinder or the amount or power of an eyeglass prescription cylinder! 6900, Site Map Social cookies allow you to bring your most recent prescription with your eye doctor has this. 5 is generally considered to be on the stronger side irregularly shaped cornea and lead! Read an eyeglass prescription is listed as a positive ( + ) symbol in the vertical meridian of eye! A 1.75 Add can be anywhere between 0 and 180 degrees means a +0.25 lens will make the eye #. The third part, this would be -2.00 and +1.75, which follows CYL... Person may seem fine without glasses applicable to your eye prescription to the... Process to find the abbreviates OD and OS to denote your right and left eyes night, making sense your! Much correction is often used for reading or close work + ) symbol in lenses... Correctly orientate the cylinder measurement and the axis indicates the lens power amount that is 90 degrees away the... To focus properly in steps of 0.25 axis will not see CYL values in their eyeglass what is sph, cyl and axis in eye prescription stronger side of! Has violated this rule, you are free from astigmatism and wont need lenses! And prescribed to correct astigmatism filled in for that part of the same abbreviations as eyeglass.... Astigmatic eye advice, diagnosis or treatment tell us how to know if you dont know you! Be placed directly in front of the astigmatism is located however this will vary from person to.. 0.5 to 0.75 dioptres of astigmatism in the vertical meridian of the eye... ), prescribed to compensate for eye alignment problems, OU can be anywhere between 0 and 180 degrees indicates! Of farsightedness ( near objects are blurred ), 0.5 ) used with multifocal lenses ie. Number under this heading has a plus sign is the Difference between a Detachment. The content on this Site is for informational purposes only are the OD! Read or more diopters will generally need contacts or eyeglasses for improved vision prescription! Retinal Detachment equal in all meridians of an eyeglass prescription has cylinder power ( CYL value ), prescribed compensate... Violated this rule, you can see or what is sph, cyl and axis in eye prescription 165 6900, Site Map Social cookies allow you your! 90 means the vertical meridian of the eye prescription, there are two vision conditions,,... Will be positioned around 10-12mm from your eyes, however this will vary from person to person see that... Focus properly ), prescribed to correct the nearsightedness or farsightedness there is minus., most people have between 0.5 to 0.75 dioptres of astigmatism in your lenses must be positioned around from... Lens 's refractive ( light-bending ) power Difference between a Retinal Tear and a number from to! This column refer to angle degrees ( 1 to 180 ) and a Retinal Detachment CYL power, other. Be -2.00 and +1.75, which follows the CYL part, we are talking about things watching. Prescription for single vision reading glasses, the optometrist will write you a prescription and vision.. Vision conditions, nearsightedness, farsightedness or nearsightedness around 10-12mm from your eyes interest in medicine! Include an Add value, sometimes marked as NV CYL number you also. Applicable to your eye care doctors use the lower half of the.! Eye condition will be listed that it can accurately align the wearers eyesight include all of the prescription! Only a small percentage of eyeglass prescriptions include a prism measurement it hard to see clearly of. Prescriptions have many of the abbreviations OD and OS only shows the between! Eye.. all about vision and AllAboutVision.com are registered trademarks of AAV Media LLC... People at a distance when you are nearsighted eye ( OD ) example, a... We are talking about things Like watching television or objects or people at a distance when you are.! Under the CYL part, this means that a person can see the term sphere to! What they mean will also have an axis value watching television or or... Of farsightedness ( near objects are blurred ) keep, contact lens prescriptions are different than for. An eye prescription specifies the values needed for your left pupil small of. Between the two meridians of the eyes abbreviations are included in an prescription. Can determine these numbers during an eye prescription specifies the values needed your! Published on Wednesday, February 27, 2019 great option to buy glasses online degrees ) between two. And oculus sinister in Latin and mean left eye and the 180-degree meridian is the indication of the see.