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HomeHomework Helphealth-scienceNight Blindness

Night Blindness

Night blindness, or nyctalopia, is a visual impairment characterized by difficulty seeing in low light conditions or darkness. It is often caused by conditions affecting the retina, such as retinitis pigmentosa or vitamin A deficiency.

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Health Science
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Overview

Night blindness is a condition that affects a person's ability to see in low light or darkness. It can be caused by various factors, including vitamin A deficiency, genetic disorders like retinitis pigmentosa, and cataracts. Understanding the causes and symptoms is crucial for diagnosis and treatmen...

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Key Terms

Night Blindness
A condition where a person has difficulty seeing in low light or darkness.

Example: People with night blindness may struggle to drive at night.

Vitamin A
A fat-soluble vitamin essential for vision and immune function.

Example: Carrots are rich in Vitamin A, which helps improve night vision.

Retinitis Pigmentosa
A genetic disorder that leads to progressive degeneration of the retina.

Example: Retinitis pigmentosa can cause night blindness as it affects rod cells in the retina.

Cataracts
A clouding of the lens in the eye that can impair vision.

Example: Cataracts can make it difficult to see at night due to increased glare.

Visual Field Test
A test that measures the entire area of vision.

Example: Doctors use visual field tests to diagnose night blindness.

Eye Exam
A comprehensive examination of the eyes to assess vision and eye health.

Example: Regular eye exams can help detect conditions that cause night blindness.

Related Topics

Color Blindness
A condition where individuals have difficulty distinguishing between certain colors.
intermediate
Cataracts
A condition characterized by clouding of the lens in the eye, affecting vision.
intermediate
Retinitis Pigmentosa
A genetic disorder that leads to progressive vision loss, including night blindness.
advanced

Key Concepts

CausesSymptomsDiagnosisTreatment