Oculus sinister the latin term for left eye pwr.
Bc mean contact lenses.
You ll also need this information if you want to order contact lenses online.
This base curve determines what type of fit is required for the lens to meet the curve of your eye.
Base curve bc of contact lens is to general measurement of the back surface of contact lens.
Base curve of disposable soft contact lenses available in the market varies from 8 4 mm to 9 0 mm.
This is important for comfort as the bc of your contact lenses should match your eye s natural curve as closely as possible to ensure a better fit when you are wearing your contact lenses.
Those features ensure comfort and encourage eye health including allowing proper oxygen to the eye.
Reading number the steeper the curve of your eye.
Power also referred to as sphere or sph bc.
Often contact lens manufacturers will only offer one or two sizes numbers like 8 3 8 6 or 8 9 and your optometrist will choose the size that would fit you best.
The bc or base curve measurement indicates the back curvature of your contact lens in millimetres.
If you realize that you ve gotten contact lenses with an incorrect base curve you may feel it.
A lens with a base curve of 8 6 is steeper than a lens with a base curve of 8 9.
Many factors affect the size of a lens including the prescription and the diameter size across the lens so a base curve in one type of lens may be slightly different in another type or brand of contact 1.
Like clothing just because you re a bc 8 6 in one brand doesn t mean.
According to laser eye surgery review the average measurement of a base curve is between 8 0 and 10 0 3.
Here s what those abbreviations mean.
This measurement is usually written in millimeters or sometimes with the words flat median or steep.
The lower your b c.
Base curve usually a number between 8 and 10 if your brand only comes in one base curve your prescription will not contain a bc value.
What happens if the base curve size is wrong.
Different individual have different curvature of their eyes.
Use this guide to read your contact prescription.
Both the base curve bc and diameter dia of a contact lens ensures a proper fit on your cornea and total eye surface.
