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 Li Zhuo

Ophthalmology

1min

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Will night blindness lead to blindness?

Night blindness first requires determining the cause of your condition. If it is due to a deficiency of vitamin A leading to night blindness, supplementing vitamin A can alleviate the symptoms, and the night blindness will disappear. However, if the night blindness is caused by retinitis pigmentosa, as this condition progresses with age, the symptoms of retinal pigment degeneration worsen and the retinal-caused night blindness will gradually intensify, eventually there is a possibility of blindness. It is essential first to determine the specific cause. Some people may experience a rapid progression of the disease, but others with retinitis pigmentosa, or such symptoms of night blindness, may not be very severe. They could maintain useful vision throughout their lives, which mainly depends on the type and severity of the genetic mutation and the specific causes.

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Written by Li Zhen Dong

Ophthalmology

38sec

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Will staying up late worsen night blindness?

If night blindness is caused by congenital reasons, then staying up late generally does not significantly worsen it. If it is caused by acquired eye abnormalities, staying up late will noticeably exacerbate the occurrence of night blindness. Additionally, if it is caused by a deficiency in vitamin A, one should rest properly, reduce close-range activities, avoid staying up late, and supplement with foods or medications containing vitamin A. If the night blindness is due to eye-related causes, active treatment and regular follow-ups are recommended. If it is due to congenital reasons, currently there are no particularly effective treatments available.

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Written by Li Zhuo

Ophthalmology

1min 23sec

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Can people with night blindness undergo myopia surgery?

Night blindness is mostly due to abnormalities in the retinal pigment epithelial cells, because when these cells are abnormal, it leads to abnormalities in the rod cells, which sometimes leads to night blindness. This is because rod cells are responsible for seeing in low light, proving that this refractive system’s weakness is akin to a camera’s film being damaged. In the case of performing surgery for nearsightedness, it is primarily because there's an issue with the eye’s refractive system, similar to having a damaged camera lens. While a damaged lens can be repaired, if the film is faulty, even a perfectly repaired lens won't improve the camera's imaging function. Thus, night blindness primarily involves the retina, whereas surgery for nearsightedness mainly involves the lens and cornea. If the retina's condition is poor, then vision improvement from nearsightedness surgery will be limited because the effectiveness of such surgery relies on the pre-surgery vision achievable with glasses. If vision with glasses is inadequate, the surgical outcomes tend to be suboptimal. Generally, we do not recommend laser surgery for patients with night blindness.

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Written by Li Zhen Dong

Ophthalmology

41sec

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Is night blindness related to myopia?

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

50sec

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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.