Early symptoms of night blindness

Written by Tao Yuan

Ophthalmology

Updated on September 14, 2024

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Night blindness is a common early symptom of eye diseases, manifested by blurred vision in dim environments. When transitioning from bright to dark environments, it takes a longer time to gradually adapt.

There are many causes of night blindness, such as common ones including vitamin A deficiency, malnutrition of rod cells, and advanced glaucoma. If symptoms of night blindness occur, it is necessary to visit an ophthalmologist in a hospital soon for diagnostic evaluation to determine the specific cause.

For night blindness caused by vitamin A deficiency, recovery can be promoted by taking oral vitamin A capsules. There is currently no effective treatment for night blindness caused by malnutrition of rod cells. For those caused by advanced glaucoma, surgical treatment is needed to delay or prevent the progression of the condition.

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Written by Tao Yuan

Ophthalmology

1min

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Does night blindness have anything to do with playing on mobile phones?

Night blindness is not related to using mobile phones. Night blindness can be caused by several reasons, with the common ones as follows: First, it can be caused by a deficiency in vitamin A, commonly seen in patients with long-term unbalanced diets and malnutrition. Vitamin A is an essential raw material for the synthesis of photosensitive substances in the retina. A deficiency in vitamin A can lead to abnormal retinal function, causing night blindness. This can be treated by taking vitamin A capsules orally or by consuming foods rich in vitamin A, such as animal liver and carrots. Second, it can be caused by retinitis pigmentosa, which is related to congenital developmental abnormalities. Currently, there are no effective treatments available. Third, it can be due to advanced glaucoma, where surgical treatment to lower eye pressure is needed to prevent and slow the progression of the condition.

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Written by Wang Hui Zhen

Ophthalmology

1min 7sec

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Does night blindness lead to blindness?

Night blindness, if severe, can lead to blindness. Night blindness refers to blurred vision at night or in dimly lit environments, or even total inability to see, causing difficulty in movement and affecting normal life. Night blindness can be categorized into congenital night blindness, acquired night blindness, and temporary night blindness. Congenital night blindness is mostly related to congenital genetic factors, where patients are born with a lack of the ability to synthesize rhodopsin, leading to night blindness. Acquired night blindness is often due to diseases of the retina itself, and it is advisable to actively treat the underlying disease, which can cure most cases. Temporary night blindness is mostly due to a lack of vitamin A in the diet or due to certain digestive system diseases affecting the absorption of vitamin A, for which it is advisable to follow medical advice and supplement with an appropriate amount of vitamin A and other treatments.

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Written by Tao Yuan

Ophthalmology

1min 1sec

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Is it useful to wear glasses for night blindness?

Patients with night blindness cannot improve their symptoms by fitting glasses. Fitting glasses is mainly used to correct refractive errors, such as myopia, hyperopia, astigmatism, etc., whereas night blindness is not caused by refractive errors. It is usually caused by the following reasons: First, it may be caused by retinal pigment degeneration, for which there is currently no effective treatment. Avoiding strong light stimulation can help delay the progression of the disease. Second, it may be caused by late-stage glaucoma, which requires treatment with medication or surgery to reduce eye pressure in order to stop and delay the progression of the disease. Third, it may be caused by malnutrition of the rod cells, related to genetic factors, for which there is also no effective treatment available. Fourth, it may be caused by a lack of vitamin A, which can be treated by taking vitamin A capsules orally. (Please follow medical advice when using medication.)

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Written by Tao Yuan

Ophthalmology

50sec

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Can people with night blindness see things at night?

Individuals with night blindness can still see at night, but with less clarity compared to those with normal vision. Night blindness can be caused by various conditions, such as advanced glaucoma, retinal pigment degeneration, Vitamin A deficiency, and poor nourishment of the rod cells in the retina. It occurs due to damage to the rod cells on the retina, which are responsible for dark vision, preventing them from functioning normally. Diagnosis can be confirmed through dark adaptation tests and electroretinography at an ophthalmology department in hospitals. Treatment for night blindness should be based on the underlying cause; for instance, if caused by Vitamin A deficiency, the condition can be treated by supplementing Vitamin A, thus either restoring health, or preventing and slowing further deterioration of the condition.

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Written by Tao Yuan

Ophthalmology

52sec

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Early symptoms of night blindness

Night blindness is a common early symptom of eye diseases, manifested by blurred vision in dim environments. When transitioning from bright to dark environments, it takes a longer time to gradually adapt. There are many causes of night blindness, such as common ones including vitamin A deficiency, malnutrition of rod cells, and advanced glaucoma. If symptoms of night blindness occur, it is necessary to visit an ophthalmologist in a hospital soon for diagnostic evaluation to determine the specific cause. For night blindness caused by vitamin A deficiency, recovery can be promoted by taking oral vitamin A capsules. There is currently no effective treatment for night blindness caused by malnutrition of rod cells. For those caused by advanced glaucoma, surgical treatment is needed to delay or prevent the progression of the condition.