Visual field versus visual evoked potentials in maculopathies and optic neuropathies.

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Imaging

Background:

• Macular diseases and axial optic neuropathies affect central vision.
• Visual evoked potential (VEP) and visual field testing are standard methods for assessing visual function.

Purpose of the Study:

• To compare the diagnostic utility of VEP and visual field testing in patients with maculopathies and axial optic neuropathies.
• To correlate VEP parameters with visual field defects in these conditions.

Main Methods:

• Tested kinetic and static visual fields and pattern reversal VEP in 52 maculopathy patients and 29 optic neuropathy patients.
• Compared central static quantitative perimetry with pattern reversal VEP results.
• Correlated P100 amplitude and latency with central visual threshold loss.

Main Results:

• P100 amplitude and latency correlated with visual threshold loss in maculopathies.
• P100 latency was not correlated with visual threshold loss in optic neuropathies, but latency delays were more pronounced.
• VEP and visual field tests showed different patterns of dysfunction in the two disease groups.

Conclusions:

• Both VEP and visual field testing are essential for evaluating functional loss in macular and optic nerve diseases.
• These tests reflect distinct underlying pathological mechanisms.
• Combined use of VEP and visual fields provides a comprehensive assessment of visual pathway integrity.