What Is Contact Lens Base Curve and Why It Matters
When you look at your contact lens prescription, you'll see a few key numbers. One of the most important, yet often overlooked, is the base curve, or BC. This number, measured in millimeters, defines the curvature of the back surface of your contact lens. Think of it this way: your cornea (the clear front part…
Dr. Teresita Bollar, OD