Visual dioptric defects

Healthy eye

The eye clearly visualizes faraway objects in infinite distance as a point on the retina, without any dioptric error , i.e. the focus lies exactly on the retina. The length of the eye (approx. 24 mm), when looking at distant objects corresponds to the eye refractive power (D = +59dpt). A distant point lies in infinity.

Emetropic eye