759PhysicsMedium
A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes:
Aon the retina
Bin front of the retina
Con the blind spot
Dbehind the retina
Correct answer
B. in front of the retina
Explanation
A concave lens is used to correct short-sightedness (myopia). In myopia, images are formed in front of the retina, resulting in a blurred image. This occurs when the eye is relatively too long or the refractive powers of the cornea and lens of the eye are relatively too strong.