Optical Prescription Terms:
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OD - Right Eye
OS - Left Eye
Sphere (SPH) - Horizontal curve of the eye’s lens, also known as your prescription power.
Cylinder (CYL) - Indicates astigmatism. Tells the vertical curve of your eye.
Axis: The degree and direction of astigmatism. If you have a cylinder number, then you will have an axis number.
Single Vision Lenses - Single vision lenses function as all purpose eyeglasses for people that have one prescription to see at all distances.
High Index - Designed for people who require strong prescriptions. These eyeglass lenses are lighter and thinner that the standard lenses.
Polarized Lenses - They reduce glare and are useful for sports and driving.
Please view How to Read a Prescriptions if you need more help