DAY BLINDNESS Meaning and
Definition
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Day blindness, medically known as hemeralopia, is a visual impairment characterized by decreased or complete loss of vision in bright light conditions, particularly during daylight hours. Individuals with day blindness experience difficulty seeing clearly in well-lit environments and may display symptoms such as blurred vision, eyestrain, and increased sensitivity to light.
Day blindness is typically caused by an abnormality in the visual system, such as damage to the retina, the thin layer of tissue lining the inner surface of the eye. This can result from various factors including certain genetic conditions, retinal dystrophy, or vitamin A deficiency. In some cases, day blindness may be a symptom of an underlying medical condition, such as cataracts or glaucoma.
The condition can significantly impair an individual's day-to-day activities, making it challenging to perform tasks that require clear vision in daylight, such as reading, driving, or recognizing faces. However, in low-light or dimly lit environments, individuals with day blindness may have relatively normal vision.
Treatment options for day blindness depend on the underlying cause. In some cases, prescription eyeglasses with tinted or polarized lenses can help reduce light sensitivity and improve visibility. However, if day blindness is caused by an underlying medical condition, addressing that condition may be necessary to alleviate the symptoms. Regular eye examinations and consultation with an ophthalmologist are essential for an accurate diagnosis and personalized treatment plan.
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• Inability to see clearly in a bright light, hemeralopia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for DAY BLINDNESS
- say blindness
- xay blindness
- cay blindness
- ray blindness
- eay blindness
- dzy blindness
- dsy blindness
- dwy blindness
- dqy blindness
- dat blindness
- dag blindness
- dah blindness
- dau blindness
- da7 blindness
- da6 blindness
- day vlindness
- day nlindness
- day hlindness
- day glindness
Etymology of DAY BLINDNESS
The term "day blindness" is derived from two separate terms - "day" and "blindness".
The word "day" comes from the Old English word "dæg", which is related to similar words in other Germanic languages. It has remained relatively unchanged in form and meaning throughout its history.
The word "blindness" comes from the Old English word "blindnes", which evolved from the Proto-Germanic word "blindinassu", meaning "blindness, dimness". This term is derived from the Proto-Indo-European root *bʰle-, meaning "shine, gleam, glow".
When combined, "day blindness" refers to a medical condition known as "hemeralopia", which is a visual disorder characterized by difficulty seeing in bright light or during the day.
