the lens being too thick and curved - so that light is focused in front of the retina. Short-sightedness can be corrected by placing a concave lens in front of the eye, as shown in the diagrams below.

Dr. Schwartz is assistant professor of clinical ophthalmology, Bascom Palmer Eye Institute ... horseshoe retinal tear. Note the small amount of adjacent vitreous hemorrhage. Diagram depicting ...

High-resolution retinal imaging based on adaptive ... The graphs below the eye models show spot diagrams, with the more compact distribution (better image quality) obtained with the realistic ...

They can only see things that are close to them. This is because the eye refracts the light and brings it to a focus before it reaches the retina. This is corrected by using a concave or a ...