Comparison of the pattern and diffuse-light visual evoked responses in definite multiple sclerosis

Area of Science:

• Neuroscience
• Ophthalmology
• Neurology

Background:

• Multiple sclerosis (MS) is a chronic neurological disease affecting the central nervous system.
• Visual evoked response (VER) testing is crucial for diagnosing and monitoring MS.
• Identifying the most sensitive VER method aids in early detection and management.

Purpose of the Study:

• To compare the sensitivity of three visual evoked response stimulation methods in patients with definite multiple sclerosis.
• To determine the most reliable indicator of visual pathway abnormalities in MS.

Main Methods:

• Prospective study of 100 patients diagnosed with definite multiple sclerosis.
• Comparison of three VER stimulation techniques: diffuse flashes, intermittent reversing pattern, and constant luminous reversing pattern.
• Analysis of latency and amplitude of specific peaks in the visual evoked response.

Main Results:

• The latency of the major occipital positive peak was the most sensitive VER abnormality indicator in MS patients.
• Intermittent and constant pattern stimulation methods showed comparable sensitivity.
• Diffuse light stimulation also revealed abnormalities, particularly prolonged latency with poor visual acuity.

Conclusions:

• Latency of the major occipital positive peak is the most effective VER parameter for detecting MS-related visual pathway dysfunction.
• Pattern stimulation techniques are highly sensitive for identifying VER abnormalities in multiple sclerosis.
• VER testing remains a valuable tool for the neuro-ophthalmological assessment of multiple sclerosis.