When the light entering in cornea cannot be sent to retina properly, breaking defects such as myopia, hypermetropia, and astigmatism occur in the eye; and the most common method used to treat these is laser.
Cataract is the opacification of the eye lens. The clouding lens will lose its transparency. Since the eye cannot receive sufficient ray, vision diminishes. The clarity and colors of objects cannot be precisely perceived.
Retina is a light case covering the inner surface of the eye ball. It hosts visual cells and visual nerve fibres. Retina detachment, diabetic retinopathy, macular degeneration, embolism in retina vessels!