Is night blindness related to myopia?

Written by Li Zhen Dong
Ophthalmology
Updated on September 13, 2024
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Night blindness generally has little to do with myopia. Night blindness can be divided into congenital night blindness and acquired night blindness, caused by retinal dysfunction. Myopia makes distant objects appear blurry and near objects clear, primarily due to changes in the eye's axis. Night blindness does not involve changes in visual acuity or the eye's axis. Once night blindness occurs, one should actively seek an ophthalmological examination and receive proper treatment. Currently, the treatment for myopia mainly includes corrective glasses, orthokeratology (corneal reshaping therapy), and surgical treatments.

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Written by Tao Yuan
Ophthalmology
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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.

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Written by Wang Hui Zhen
Ophthalmology
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What should I do if night blindness is afraid of sunlight?

People with night blindness, who are sensitive to sunlight, can wear sunglasses when going out, and should actively seek treatment for night blindness. Night blindness refers to the blurriness or complete inability to see in dim light or at night, which makes mobility difficult. Night blindness can be categorized into congenital night blindness, acquired night blindness, and temporary night blindness. Congenital night blindness is mostly related to hereditary factors, where patients are born lacking the ability to synthesize rhodopsin, leading to night blindness. It is recommended to supplement vitamin A in appropriate amounts, and gene therapy is a potential treatment direction. Acquired night blindness is generally caused by diseases of the retina or other eye conditions, and it is recommended to actively treat the primary disease. Temporary night blindness is often due to a lack of vitamin A in the diet or due to some digestive system diseases affecting the absorption of vitamin A. It is advisable to supplement vitamin A as per medical advice and actively treat digestive tract diseases.

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Written by Tao Yuan
Ophthalmology
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Patients with night blindness are lacking something.

Night blindness is a common symptom in ophthalmology, referring to a condition where patients cannot see clearly in dim environments. Night blindness can be caused by various reasons, among which vitamin A deficiency night blindness occurs due to the patient's long-term picky eating or malnutrition, leading to insufficient intake of vitamin A. Vitamin A is an essential raw material for the synthesis of photosensitive substances in the retina, and its deficiency can lead to night blindness. Night blindness caused by retinal pigment degeneration, malnutrition of rod cells, and late-stage glaucoma does not involve a lack of nutritional elements in the patient's body. Instead, it results from damage to the rod cells in the retina or the nerve fiber layer, which prevents them from sensing light stimuli in dark environments.

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Written by Tao Yuan
Ophthalmology
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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
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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.