What are the symptoms of night blindness?
Disease description:
I have been having blurry vision at night recently and suspect I might have night blindness. I would like to know what symptoms are associated with night blindness?
Doctor's answer (1)
Dr. Wang Shuai
Night blindness, medically also known as nyctalopia or impaired dark adaptation, presents with the following symptoms:
1. Decreased sensitivity to low light: vision deteriorates in dimly lit environments such as at dusk, at night, or in poorly lit rooms, making it difficult to discern the surroundings and objects.
2. Prolonged visual adaptation time: when moving from a bright environment into darkness, the eyes require more time than normal to adapt and regain regular vision.
3. Restricted visual field: some patients experience a narrowing of their visual field, especially noticeable at night or in dim lighting, where their field of vision is smaller compared to normal individuals.
4. Difficulty adapting to light: upon sudden transition from darkness to a brightly lit area, there may be temporary blurred vision or discomfort.
5. Dry eyes and corneal softening: patients may experience dry eyes and softening of the cornea, particularly common in cases of vitamin A deficiency. Additionally, symptoms may include dry skin, keratinization, scaling, nails with ridges that lose luster and break easily, and brittle hair prone to falling out.
Vitamin A deficiency is one of the most common causes of night blindness and is often seen in malnourished populations. Hereditary retinal diseases such as retinitis pigmentosa, early-stage cataracts, glaucoma, and diabetic retinopathy can also cause night blindness.
If symptoms persist or worsen, prompt medical attention should be sought for accurate diagnosis and effective treatment.
