Almost half of the population of blind people in the United States is over sixty five years of age. A figure that may well support the fact that blindness generally occurs as the year in one's life advances. Americans,the young, the adult, and the old are all victims of blindness.
Before we get hit by this, we should check on its causes and cures to be able to deal with it.
Causes of Blind
Glaucoma medications that work by constricting the pupil.
Presence of cataracts.
Retinitis pigmentosa - a retinal degenerative disorder
Vitamin A deficiency
Malabsorption - if it affects vitamin A absorption
Common symptoms include difficulty in vision when driving in the evening or at night, poor vision in reduced light, and feeling that the eyes take longer to "adjust" to seeing in the dark.
Associated symptoms include:
Vitamins that may be helpful in case of night blindness - Night blindness may be an early sign of Vitamin A deficiency. Such a deficiency may result due to a diet low in animal foods, such as eggs, dairy products, meat and fish. Low intake of fruits and vegetables containing beta-carotene, such as carrots, mango, spinach, sweet potato, which the body converts into vitamin A, may also contribute to a vitamin A deficiency. Doctors often recommend Vitamin A dietary supplements per day to correct a deficiency. Beta-carotene is less successful at correcting vitamin A deficiency than vitamin A itself, because it is not relatively well-absorbed into the body, and is only slowly converted by the body into vitamin A.
Zinc deficiency in diet is common, and a lack of zinc may reduce the activity of retinol dehydrogenase - the enzyme needed to help vitamin A work in the eye. Zinc is helpful in people whose night blindness is caused due to zinc-deficiency; therefore, many doctors suggest 15 to 30 mg of zinc per day to support healthy vision. As long-term zinc supplementation may reduce copper levels in the body, 1 to 2 mg of copper per day is also recommended for people who are on zinc supplements for more than a few weeks.
How is Night Blindness treated?
Treatment for night blindness will depend upon its cause. Treatment may be quite simple as a new prescription eyeglasses or changing glaucoma medications, or it may be complex requiring surgery in cases of cataracts.
If night blindness is caused by nearsightedness, the patient may need to wear glasses at night. Night blindness if caused by a loss of some of the function of the rods, then a visual field examination is performed. Tests would need to be performed to determine whether the receptor cells in the retina are functioning properly, or if the problem is somewhere else. But most times there's nothing that can be done if these cells are damaged.
If a doctor determines that there is simply a need for vitamin A to help the night blindness, then that would be recommended. For those patients who have retinitis pigmentosa, vitamin A is being used to help.
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