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Visual evoked response in macular diseases
K Manoj1, R G Sharma, S R Kumar
1Taparia Institute of Ophthalmology, Bombay Hospital.
Indian Journal of Ophthalmology
|April 1, 1991
Summary
Visual evoked responses (VER) in unilateral maculopathy patients revealed distinct patterns. Macular diseases with fluid showed reduced VER amplitude, while degenerative conditions increased latency, indicating conduction defects.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Electrophysiology
Background:
- Maculopathy affects central vision, impacting visual acuity.
- Visual evoked responses (VER) assess the integrity of the visual pathway.
Purpose of the Study:
- To compare VER parameters (latency, amplitude) between affected and unaffected eyes in unilateral maculopathy.
- To differentiate between types of macular disease based on VER characteristics.
Main Methods:
- Recording of visual evoked responses (VER) in 10 patients with unilateral maculopathy.
- Comparative analysis of VER latency and amplitude between the affected and unaffected eyes.
Main Results:
- In Central Serous Retinopathy and Traumatic Macular Oedema, VER showed amplitude reduction correlating with visual acuity, with no significant latency change.
- In Degenerative Maculopathy, VER latency was markedly increased, indicating a conduction defect.
Conclusions:
- VER amplitude reduction is characteristic of macular disease with fluid accumulation.
- Increased VER latency signifies conduction defects in degenerative macular diseases.