How To Read Eyeglasses Spec Sheet

To determine which eye is which.

How to read eyeglasses spec sheet.

So the prescription for reading glasses for the right eye would be 0 25 0 50 x 180. How to read eyeglasses prescriptions when you look at a standard prescription the first word you ll see is distance this term refers to what power of lens you will need to see distant objects clearly. 1 x research source. J nv near vision your prescription is for reading only k pd pupillary distance the measurement in millimeters mm between both pupils l 75 0 75 m 125 1 25.

They are abbreviations for oculus dexter and oculus sinister which are latin terms for right eye and left eye your eyeglass prescription also may have a column labeled ou. For multi focal glasses as well as reading and computer glasses your rx will include an add or nv value. Most prescriptions will include at least two rows of numbers one labelled o d. A number over 5 is generally considered to be on the stronger side.

When you look at your prescription for eyeglasses you will see numbers listed under the headings of os and od. Your eyes size is the only measurement that falls between 40 to 60 millimetres 1 6 to 2 4 in so you can use this range to ensure that you re reading the correct number. The first step to understanding your eyeglass prescription is knowing what od and os mean. This number measures the width of 1 lens spanning the distance at its widest point.

The type of rx glasses may be noted on a prescription such as dv distance vision nearsightedness and nv near vision reading. Your ophthalmologist or optometrist determines this power by trying different lenses while you read an eye chart in the exam. However you have to do a little algebra to figure the total power needed for single vision reading glasses. Your prescription may be written out on a blank rx pad instead of a pre made rx pad for eyeglasses only.

The higher the number on your prescription the stronger your prescription is. Os oculus sinister means the left eye and od oculus. For the left eye the calculation is 1 75 1 00 2 75 d s. They are latin abbreviations.

In the example above it is 2 00 1 75 0 25. Using material data sheets for your design. Some prescriptions may use r e. Occasionally you may see a prescription with a line labeled o u or oculus uterque for both eyes.

Find the first 2 digit number to read your eye size.