Cataract-
It is the cloud of the usually translucent lens in the eye. It lowers the degree of precision and therefore the stuff seen shall become blurring.
Cataract is a normal cause of poor dream. It normally develop slowly as soon as people get elder, but this can also take place to young people or be near at birth. In the late stages of the cataract us process, it is a common part of aging and is not deemed as a disease at all. As we age, chemical changes arise in the human lenses that render it less transparent. Intended for mild cases, it barely affect ghoul, but for relentless gear, purely light and dark can be seen. Without efficient treatment, cataracts account for as much as 50% of the world’s mass blindness and it is one of the world’s primary causes of blindness

Glaucoma-
It is a disease that includes any eye disease which causes an increase in force in the eye. The eye is dense with a clear fluid — humor — which help sustain the eye’s shape and nourishes the lens and cornea. The biliary body always secretes new humor and the glut is drained from side to side the frontage of the eyeball. In glaucoma, the solution does not consume away properly; the pressure inside the eye accumulates, pinching the blood vessels to the optic nerve. As the nutrients cannot be transported the daring cells using the blood vessel, the guts cells quickly die, cause progressive pasting of idea which can lead to total shiftlessness. This results in visual loss by harmful the optic nerve and retina. Unluckily, glaucoma is generally detected when the patient has already suffered vision loss and this visual loss is irreversible, no medical treatment or surgical operation can restore the vision.