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Related Experiment Videos

Optic disc pallor: a false localizing sign

N J Newman1

  • 1Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia.

Survey of Ophthalmology
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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A cone dystrophy diagnosis was confirmed in a pregnant woman with vision loss using an electroretinogram. This test helps identify cone photoreceptor abnormalities, avoiding further invasive procedures.

Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology
  • Medical Diagnostics

Background:

  • A 20-year-old pregnant woman presented with bilateral decreased visual acuity and optic disc pallor.
  • Profound color vision deficits were noted, disproportionate to the acuity loss.

Observation:

  • Cone photoreceptor abnormality was suspected due to the disproportionate color vision deficits.
  • An electroretinogram (ERG) was performed to evaluate retinal function.

Findings:

  • The electroretinogram confirmed the diagnosis of cone dystrophy.
  • This diagnosis explained the patient's symptoms and precluded the need for further testing.

Implications:

  • Cone dystrophy should be considered in the differential diagnosis of bilateral visual loss, particularly when color vision is affected disproportionately.

Related Experiment Videos

  • This is relevant even with normal retinal appearance and no significant family history.
  • Electroretinography is a valuable, non-invasive tool for diagnosing cone dystrophy.