Prevention and Precautions
Give due care to the
eyes of a new born child. It is important to get the eyes examined.
Visit a retinal clinic for a check up of the diseases of the retina.
Take timely care and specialist's treatment for all eye problems.
Colour Blindness
Human
eye perceives colour through the cones in the retina. The three primary
colours, red, green and blue in the white light spectrum are
appreciated by different cones, since each cone is able to respond only
to a specific wave length. Normal appreciation of colour shades depends
on the intensity of the light and summation of impulses from different
cone regions. In low intensity of light, colours cannot be appreciated.
Colour blindness is a congenital disease. It is confirmed by giving the
patient the Ishiera colour book and the Edridge green lantern tests.
The patients misinterpret different colours.
Suggestion: Vitamin A helps in some cases. Also see general hints.
Contact Lens
Contact lenses have cosmetic value and provide better vision than glasses. Trachoma patients have difficulty in using contact lenses. Hard contact lenses are made of rigid plastic.
