SPH (sphere): the amount of long (+) or short (-) sight. The higher the number, the stronger the prescription lens required.
CYL (cylinder): the amount of astigmatism, or visual distortion, caused by an irregularly shaped cornea.
© Uniglasses Copyright 2021.
Enter your details below to save your shopping cart for later. And, who knows, maybe we will even send you a sweet discount code :)