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Doctor insights on: Prescription Glasses Od Vs Os

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Dr. Tim Conrad
801 doctors shared insights

Glasses (Definition)

Glasses is a term that describes a pair of lenses that are placed in a frame to be worn to correct faulty vision ...Read more


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I have astigmatism. My perscription: OD -0.5 D Cyl ax 95 and OS -0.5 D Cyl ax 70. Can I safely wear -0.5 ordinary spherical contacts instead of toric?

I have astigmatism. My perscription: OD -0.5 D Cyl ax 95 and OS -0.5 D Cyl ax 70. Can I safely wear -0.5 ordinary spherical contacts instead of toric?

Need more info: The correct person is the person who did your refraction whether it be an optometrist or ophthalmologist who can go over the benefits and non benefits of these two lenses. ...Read more

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My daughter's eye prescription is od -3.00 sphere +2.00 cylinder 110 aaxis and os -6.00 sphere +2.50 cylinder 30 axis what does this mean?

My daughter's eye prescription is od -3.00 sphere +2.00 cylinder 110 aaxis and os -6.00 sphere +2.50 cylinder 30 axis what does this mean?

OD is right eye,: OS is left eye. The first #s. sphere, are negative, meaning she is nearsighted. The second #s (cylinder) is the amount of astigmatism that is present. Since astigmatism means the eye is focusing light at an angle, astigmatism comes with a rotation axis. The cylinder is rotated to this axis so that the light can be focused straight on. ...Read more

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Top lenses or solution for high plus prescription glasses?

Top lenses or solution for high plus prescription glasses?

High index : Helps make lenses thinner, solution? To clean? Warm soap and water the best, dry with non scratch cloth. I like the sprays the optical stores have with soft cloth. ...Read more

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My eye power is bc 8.5/sph -6.00 cyl -1.75/ax 180. Can I get lasik eye surgery?

My eye power is bc 8.5/sph -6.00 cyl -1.75/ax 180. Can I get lasik eye surgery?

Most likely yes: With current laser technology, a prescription of sph -6.00 cyl -1.75/ax 180 is able to be corrected very well. To determine if you are a candidate for LASIK, a thorough eye exam that includes measuring the cornea thickness would be needed. ...Read more

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My prescription is right eye- Sph +1.75. Cyl -2.00 axis 104. Left eye- +.25. Cyl -.25. axis 115. Add +2.00. Can I get away without glasses??

My prescription is right eye-   Sph +1.75. Cyl -2.00 axis 104.  Left eye- +.25. Cyl -.25. axis 115. Add +2.00.   Can I get away without glasses??

Probably but: its important to check with your state DMV as to the minimum vision requirements for driving. In most states, if you are 20/40 or better without glasses, you are fine. Your left eye prescription is minimal. Otherwise, if you feel like you function well without glasses then don't bother. Be safe. ...Read more

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Please advise what is spherical, cylindrical & axis according to eye prescrption?

Please advise what is spherical, cylindrical & axis according to eye prescrption?

Powers: Spherical is the basic power of how plus or minus a correction you need. Astigmatism is the ovalness of the eye and the cylinder refers to the power (how much) ovalness there is and the axis is the orientation of the ovalness (from 0 degrees to 180 degrees). ...Read more

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I have a corrective lens prescription for myopia. How do I derive the intermediate (computer) distance from a D.V. prescription?

I have a corrective lens prescription for myopia. How do I derive the intermediate (computer) distance from a D.V. prescription?

Add a little plus: In most cases the prescription will be for distance indicating some degree of minus power. To adjust for computer screen distance, add +1.25 to this power and that usually works. Note however, that the pupillary distance (the space between each eye) is set for distance viewing (usually 57-63 mm) and needs to be adjusted closer for viewing of a video screen. ...Read more

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Whats my prescription for contact lens power?

Whats my prescription for contact lens power?

The convention: Is that the top line is for the right eye and the second line is for the left eye. ...Read more

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My eyeglass script is od: +1.25-2.00x150 , os: +1.50-2.50x90 with add power of +2.50. What would my script be for an intermediate RX with reading?

See below: +2.50=-2.00 x 150 right; +2.75=-2.50 x 90 left Add power is +1.25. This would give what I call 'computer glasses' with intermediate and near range. ...Read more

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I'm 43 and feeling eye strain lately. My prescription in both eyes: sphere +25, -.50 cylinder, od axis 85, os axis 105 with a +1.00 add. Will glasses help?

I'm 43 and feeling eye strain lately. My prescription in both eyes: sphere +25, -.50 cylinder, od axis 85, os axis 105 with a +1.00 add. Will glasses help?

Small numbers: These figures indicate a very minor degree of distance correction. You are at an age when near vision is an issue and might need correction at near. Is your strain from reading? and near vision? If it is generalized, then check with your ophthalmologist for evaluation. ...Read more

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Can an astigmatism prescription of 2.25x100 require a high index lens?

Can an astigmatism prescription of 2.25x100 require a high index lens?

No: This could easily be done with a standard lens material. High index is nicer because it is thinner and lighter, but more expensive. ...Read more

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How safe is ortho k treatment for nearsighted eyes?

How safe is ortho k treatment for nearsighted eyes?

Mostly: Ortho k is a systemic of molding mildly myopic eyes to correct the vision by wearing a series of too flat hard lenses which push the center of the eye inwards. It is a tradeoff since to maintain any improvement, you have to wear a "keeper" lens at night. It was developed as a way to keep non-professionals like optometrists in the vision correction game. It reverses when you stop the lenses. ...Read more

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Os +0.5x-0.5, od 0x-0.25 after lasik for myopia. Is left eye considered over corrected? Can definatley tell difference at close range.

On target: Your spherical equivalent in the left eye is 0.25, which is not the cause of your close range issues. Use magnifier reading glasses to help your normal presbyopia. ...Read more

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What is diopter in prescription lens?

What is diopter in prescription lens?

Power designation: This is a term from optics indicating the light bending ability of the lens in question. The number is generated in the process of refraction in the ophthalmologists office, and then written on the prescription so the optical shop can make the lenses of the proper power. ...Read more

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Crystalens vs Toric Lense for Cataracts/Astigmatism. Which is better?

Crystalens vs Toric Lense for Cataracts/Astigmatism.  Which is better?

Toric IOLs: The Crystalens and Trulign are high tech intraocular lenses called presbyopia-correcting or "premium" IOLs. Crystalens for those who have both cataracts and hyperopia, which causes near vision problems. The Trulign Toric IOL best suited to people who have astigmatism and wish to have improved uncorrected near, intermediate and distance vision after cataract surgery. Be prepared for side effects ...Read more

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Contacts vs glasses gave anyone long-term improvement in vision?

Contacts vs glasses gave anyone long-term improvement in vision?

Similar: Both glasses or contact lenses correct the refractive error to make the images clear. They both improve vision for a long term, but the corrective error can change with time or different conditions then the person will need an adjustment to either glasses or contact lenses. ...Read more