The first eye bank was founded in 1944. Currently, in the United States, eye banks provide tissue for about 46,000 cornea transplants each year to treat conditions such as keratoconus and corneal scarring.
What thin, circular structure in the eye controls the diameter and size of the pupil and the amount of light reaching through it?
What is the transparent front part of the eye which, while contributing most of the eye's focusing power, has a fixed focus?
