Q: The differences between contact lens of the base curve 8.6 and 8.9.
A: For those who have your contact lens fitting exam, your talent doctor measures the curves of your eye which has a keratometer. The measurements are known as k-readings.
Your talent doctor uses the k-readings to discover which contact lens's curve will give you the very best vision, be the beloved, and maintain eye healthy.
The camp curve of an contact averages within the variety of 8.0 to 9.5 millimeters, with regards to the flatness or curves from the surface of your eye.
Lenses are usually accessible in just a couple base curves per style, such as 8.3, 8.6 or 8.9. The bottom the telephone number, the steeper from the curve, or angle, on the lens plus your eye.
A lens with a base curve of 8.6 is steeper when compared to a lens that has a base curve of 8.9. Many factors affect the length of a lens, including the prescription plus the diameter (size over the lens), so a base curve in one form of lens could possibly be slightly different in another type or brand of contact.