I have confidently helped patients navigate the IOL selection process for both cataract surgery and refractive lens ...

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

These two defects are treated with spectacle lenses, which refract (bend ... Short-sightedness can be corrected by placing a concave lens in front of the eye, as shown in the diagrams below.