In his answer to this question, Peter Bursztyn writes that he isn’t sure “how one could determine whether a wolf, an eland or a cheetah were short-sighted”. He says: “I can’t imagine devising ...

Short-sightedness (myopia) and long-sightedness (hyperopia) are usually due to a mismatch between the length of the eye, from front to back, and the combined power of the cornea –the transparent ...