Nachtsehenprobleme

Nachtsehenprobleme, also known as nyctalopia or night blindness, refers to a reduced ability to see in low light conditions. This condition is not a disease itself but rather a symptom of an underlying issue affecting the eyes' photoreceptor cells, specifically the rods, which are responsible for vision in dim light.

Several factors can contribute to night blindness. Nutritional deficiencies, particularly a lack of vitamin A, are a common cause, as vitamin A is crucial for the production of rhodopsin, the light-sensitive pigment in rods. Certain genetic disorders, such as retinitis pigmentosa, can progressively damage the retina and impair night vision. Cataracts, which cause clouding of the lens, can also scatter light and make it difficult to see clearly in low light. Other conditions like glaucoma, diabetic retinopathy, and myopia can also be associated with reduced night vision.

Symptoms typically include difficulty seeing in dimly lit environments, such as at dusk, dawn, or indoors with low lighting. Individuals may experience increased sensitivity to glare from headlights or other light sources. While some causes of night blindness are treatable, such as vitamin A deficiency or early-stage cataracts, others, like advanced retinitis pigmentosa, may have limited treatment options. Diagnosis usually involves a comprehensive eye examination, including tests to assess visual acuity, peripheral vision, and retinal function.