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Related Experiment Videos

Contrast letter acuity as a visual component for the Multiple Sclerosis Functional Composite.

L J Balcer1, M L Baier, J A Cohen

  • 1Division of Neuro-Ophthalmology, Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia 19104, USA. lbalcer@mail.med.upenn.edu

Neurology
|November 26, 2003
PubMed
Summary

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Contrast letter acuity testing using Sloan charts effectively identifies visual dysfunction in multiple sclerosis (MS) and captures unique neurological aspects not measured by current tools, making it ideal for the Multiple Sclerosis Functional Composite (MSFC).

Area of Science:

  • Ophthalmology
  • Neurology
  • Clinical Trials

Background:

  • Visual dysfunction is a primary cause of disability in multiple sclerosis (MS).
  • Current clinical trial outcome measures, like the Multiple Sclerosis Functional Composite (MSFC), lack a visual function test.
  • There is a need to incorporate visual assessments into MS outcome measures.

Purpose of the Study:

  • To evaluate contrast letter acuity as a potential visual function test for the MSFC.
  • To determine if contrast letter acuity can distinguish MS patients from healthy controls.
  • To assess the correlation of contrast letter acuity with existing MS disability scales.

Main Methods:

  • Binocular contrast letter acuity was assessed using Sloan charts in MS patients and controls.

Related Experiment Videos

  • Participants were drawn from the IMPACT Substudy and the MVP cohort.
  • Contrast sensitivity, color vision, and visual field tests were also performed in the MVP cohort.

    • Main Results:

    • Contrast letter acuity (Sloan charts) and contrast sensitivity (Pelli-Robson chart) significantly differentiated MS patients from controls.
    • Sloan chart scores showed significant, moderate correlations with MSFC and EDSS scores.
    • These findings suggest Sloan chart scores capture visual and neurological dysfunction beyond current measures.

    Conclusions:

    • Contrast letter acuity (Sloan charts) and contrast sensitivity (Pelli-Robson chart) are effective in identifying binocular visual dysfunction in MS.
    • Sloan chart testing offers a valuable addition to the MSFC by assessing unique neurological aspects.
    • Contrast letter acuity is a strong candidate for inclusion in the MSFC to improve its assessment of MS-related disability.