Cornea is the transparent, dome shaped front portion of the eye, covering iris, pupil and the anterior chamber. Cornea provides most of the optical power of the eyes, and thus helps the eye to focus on any object. It is a powerful refracting surface.

An adult cornea is 11.5 mm in diameter, has a 0.5 mm thickness and consists of five layers. The cornea does not have any blood vessels and gets oxygen direct from the air. The cornea has a shiny surface, and is highly sensitive. The transparency of the cornea is due to the presence of collagen fibres, and anything that affects these collagen fibres will cause serious corneal problems like corneal dystrophy.

Cataract is an unhealthy medical condition that develops in the lens of the eye. It prevents light from entering the retina of the eyes. Cataract affects all age groups and in an advanced stage, the cloudiness of the lens increases resulting in a decrease in the light reaching the retina. This will lead to a significant sight loss, and eventually, total blindness. Diabetes, glaucoma, smoking, eye injuries, infection etc are also known to cause cataract.

A majority of the visual problems, affecting the eye can be avoided, if one takes due care in protecting and preserving this precious gift, that we call vision. Taking due care of the eyes, is the only way to prevent all forms of eye diseases affecting the lens, cornea and any other part of the eye