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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...

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Related Experiment Video

Updated: Jun 2, 2026

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[Visual function evaluation in human immunodeficiency virus carriers].

A Solís-Castillo1, L A Ramírez-Ponce, T Valdez-González

  • 1Departamento de Enfermedades Inflamatorias Oculares, Fundación Hospital Nuestra Señora de la Luz, I.A.P., México, D.F., México. asolis7@gmail.com

Archivos De La Sociedad Espanola De Oftalmologia
|May 17, 2011
PubMed
Summary
This summary is machine-generated.

This study found reduced peripapillary nerve fiber layer thickness and altered color vision and contrast sensitivity in patients without infectious retinitis. Electroretinography and dark adaptation showed no significant changes.

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Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology

Background:

  • Peripapillary nerve fiber layer (PNFL) thickness is a key indicator of optic nerve health.
  • Assessing visual functions like color vision and contrast sensitivity is crucial for detecting subtle visual impairments.

Purpose of the Study:

  • To investigate changes in PNFL thickness, color vision, contrast sensitivity, dark adaptation, and electroretinography (ERG) in patients without infectious retinitis.
  • To identify early indicators of visual dysfunction in a non-infectious context.

Main Methods:

  • Study included 52 patients with no prior ocular pathology.
  • Evaluated PNFL thickness across all quadrants.
  • Assessed color vision, contrast sensitivity, dark adaptation, and performed ERG.

Main Results:

  • A significant decrease in PNFL thickness was observed in all quadrants except the nasal.
  • Color vision was impaired in 27.77% of patients.
  • High-frequency alterations were noted in contrast sensitivity testing. No significant differences were found in ERG or dark adaptation.

Conclusions:

  • Patients without infectious retinitis exhibit changes in PNFL thickness.
  • Alterations in color vision and contrast sensitivity are present.
  • A trend towards decreased B-wave amplitude in ERG was observed, suggesting potential subclinical optic nerve dysfunction.