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Related Experiment Videos

Through a shade darkly.

V Purvin1

  • 1Midwest Eye Institute, and Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, USA.

Survey of Ophthalmology
|February 20, 1999
PubMed
Summary
This summary is machine-generated.

Vitamin A deficiency can cause nyctalopia (difficulty seeing in dim light). This condition, linked to past ileal-jejunal bypass surgery, was successfully treated with vitamin A supplements, restoring vision.

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Area of Science:

  • Ophthalmology
  • Nutritional Science
  • Gastroenterology

Background:

  • Nyctalopia, or night blindness, can indicate underlying retinal dysfunction.
  • Malabsorptive conditions, such as those following ileal-jejunal bypass surgery, may lead to vitamin deficiencies.

Observation:

  • A 43-year-old male presented with nyctalopia.
  • Diagnostic tests, including a prolonged photostress test and electroretinogram, indicated retinal dysfunction over optic nerve issues.

Findings:

  • The patient was diagnosed with vitamin A deficiency.
  • The deficiency was attributed to a history of ileal-jejunal bypass surgery, a known cause of nutrient malabsorption.

Implications:

  • Early diagnosis and treatment of vitamin A deficiency are crucial for preventing irreversible vision loss.

Related Experiment Videos

  • This case highlights the importance of considering nutritional deficiencies in patients with a history of bariatric surgery presenting with visual disturbances.
  • Oral vitamin A supplementation effectively reversed the visual symptoms and signs of nyctalopia.