Refractory defects

It is a natural process of the eye coming with aging. We focus objects at near and at intermediate distances using crystalline elasticity. With age, the lens gradually loses its [...]

It's an alteration of the corneal curvature. At retinal level, images arriving at macula region are overlapped and the patient sees a halo around the objects he/she is looking at. [...]

The axial length of the eye is less than that of the eye that does not need corrective lenses (emmetropia). The patient sees well from far away, but eye structures [...]

The axial length of the eye is greater than that of the eye which does not require corrective lenses (emmetropia). The patient has bad sight at a distance because [...]