Relationship between contrast sensitivity test and disease severity in multiple sclerosis patients

Area of Science:

• Ophthalmology
• Neuroscience
• Clinical Research

Background:

• Multiple sclerosis (MS) is a chronic neurological disease affecting vision.
• Assessing visual function is crucial for monitoring MS progression and disability.
• Contrast sensitivity is an important visual parameter potentially impacted by MS.

Purpose of the Study:

• To evaluate the utility of the Pelli-Robson contrast sensitivity test in multiple sclerosis (MS) patients.
• To correlate Pelli-Robson test results with the Expanded Disability Status Scale (EDSS) in MS patients.

Main Methods:

• Retrospective study of 62 multiple sclerosis patients categorized by EDSS levels (A: <1.5, B: 1.5-3.5, C: >3.5).
• Visual acuity, monocular, and binocular contrast sensitivity measured using Snellen and Pelli-Robson tests.
• Comparison with 12 disease-free control participants; correlation analysis performed.

Main Results:

• Pelli-Robson contrast sensitivity values were lower in MS patients compared to controls.
• Statistically significant differences observed in monocular contrast sensitivity (P<.05).
• Progressively lower monocular and binocular Pelli-Robson values were found in higher EDSS groups (P=.05 and P=.027 respectively).

Conclusions:

• The Pelli-Robson test effectively demonstrates reduced contrast discrimination in multiple sclerosis patients.
• Contrast sensitivity significantly decreases as the neurological disability, measured by EDSS, increases in MS.
• The Pelli-Robson test is a valuable tool for assessing visual impairment related to MS severity.