What is OD and OS for contacts?

When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS (oculus sinister) means the left eye and OD (oculus dextrus) means the right eye. Occasionally, you will see a notation for OU, which means something involving both eyes.

What does add mean for glasses?

Add stands for Addition. It stands for the additional correction that you need for reading. It is used in bifocal glasses, reading glasses, or varifocal glasses.

Is OD left or right contacts?

They abbreviate the words oculus dexter and oculus sinister: Latin words for “right eye” and “left eye.” You may also see a column labeled “OU,” and this abbreviates the Latin term oculus uterque. This means “both eyes.”

What do the letters on contact lenses mean?

Occasionally you may see the letters OU on your prescription, which is short for “oculus uterque” or EACH EYE, meaning the same measurement applies to both. PWR: PWR refers to refractive power. Sometimes this may also be called SPH (sphere.) It is common to have a different prescription in each eye.

Which contact is for the right eye?

Here’s how they break down: OS Eye: Oculus Sinister – This is Latin for “Left Eye.” All the numbers pertaining to “OS” are specifically for your left eye. OD Eye: Oculus Dexter – This is Latin for “Right Eye.” All the numbers pertaining to “OD” are specifically for your left eye.

What are the abbreviations for contact lens prescriptions?

Below are the definitions of the symbols/abbreviations used in a typical contact lens prescription: Eye – Which eyes the prescription line item is for. OS – Left Eye. OD – Right Eye. OU – Both Eyes. BC – Base Curve (usually a number between 8 and 10) DIA – Diameter (usually a number between 13 and 15)

How are contact lenses different from contact lenses?

And the power will also be different because, while a contact lens sits directly on the surface of the eye, eyeglasses sit about 12mm in front of it. So the eyeglass prescription must account for that distance as well. Each of your eyes may have different challenges to correct.

Is the power of a contact lens the same as an eyeglass prescription?

In addition to the lens power, your contact lens prescription contains several other pieces of information related to the size of the lens. Even the power of the lenses is generally not the same as in your eyeglass prescription.

Do you need a prescription for contact lenses?

Mostly all contact lenses are available with power, even colored lens. You might actually not need contact lenses for corrective reasons; however, you should still have a prescription for any contact lens you plan on placing in your eye.

What is OD and OS for contacts? When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS (oculus sinister) means the left eye and OD (oculus dextrus) means the right eye. Occasionally, you will see a notation for OU, which…