Types of blindness

- Complete blindness We have already mentioned. - Partial blindness: A weakness in the eyes of the eye from counting fingers to 6/24 and the weakness of the eye in this case because of a lack of integration of the optic nerve growth or optical center of the eye. Here and be eye-disease-free, however there is no cure for this condition. - Blindness as a result of an accident: To the eye itself or blow to the head affect the visual center of the brain, or as a result of bleeding in the retina due to high blood pressure or diabetes. - Color blindness: The human eye is able to receive the same wavelength of light rays between 400-700 Mlamkron .. known as the optical spectrum Visual Spectrum. It consists of seven colors: red, orange, yellow, blue, green, indigo and violet. And the Federation of these colors consists white, and looks colorful objects by the way it bounces, and expose it to the light falling on them. This and the increasing intensity of the lighting affects the virtual change in color and not so patient is unable to distinguish colors, especially red and green color. Usually, the cause of congenital blindness and partly colors occurs in males than in females. And can be passed down, and there is no cure. It may be acquired as a result of inflammation or damage to the retina or optic nerve or the placenta as is the case in patients with diabetes, the black water and night blindness ..... - Night blindness or night blindness: We have already mentioned. - Blindness migraine: There are some people who complain of sudden weakness in the yard lateral view of the eye from the right or the left or the upper or lower for reasons that can be summarized as follows: 1. fall or tear in the retina 2-stroke and bleeding in one of the branches of the blood vessels in the retina. 3. tumor next to the optic nerve or the ropes leading to the optical center (gradual blindness). - Psychological blindness: That half the patients with hysteria or mental illness complain from time to time and the other of vision loss in one or both eyes, and some students complain of the weakness of their evasion of study or work or conscription, and when the scrutiny can find out the motives of the complaint and the transformation of such cases to a psychiatrist. Global Health Agency of blindness statistics: The number of visually look at the world around 40 million increase to 86 million in 2030.