Night blindness

This disease causes damage to the retina at the young age of five to the age of thirty. It is more in males than in females, and has a hereditary nature, begins in the retina parties heading gradually towards the center and the first to complain about the patient is considered weak in the evening and in the dim light, and notes the parents to young people living with this disease difficulty in movement and walking in the dark places, and in the Note ma things At the exacerbation of the disease, the patient begins to feel that the lateral view taken shrink to the point that Atakbl like look at things through a tube or cylinder minutes. This situation continues to evolve to profoundly affect the unity of matter and strength, but does not lead to total blindness, and this disease is sometimes accompanied by a white water in the lens, and the cause of this disease is unknown exactly congenital and has no cure yet. If injured by a family member, it should be checked others, to make sure they are free of it...