Electroretinogram and Visual Field Correlation in Birdshot Chorioretinopathy

Area of Science:

• Ophthalmology
• Medical Imaging
• Clinical Research

Background:

• Birdshot chorioretinopathy (BCR) is a rare inflammatory condition affecting the choroid and retina.
• Assessing visual function and disease progression in BCR is crucial for patient management.

Purpose of the Study:

• To investigate the correlation between visual field parameters and electroretinogram (ERG) findings in patients with BCR.
• To determine the utility of ERG as an objective measure of visual function in BCR.

Main Methods:

• A retrospective cross-sectional study involving 21 eyes of 11 BCR patients.
• Analysis of Goldmann kinetic perimetry (isopters V4e and I4e) and standard ERG parameters (amplitudes and implicit times).
• Generalized estimating equation used to model correlations between visual field and ERG measures.

Main Results:

• A strong positive correlation was observed between the V4e isopter size and all scotopic and photopic ERG amplitudes.
• Significant negative correlations were found for specific ERG implicit times with the V4e isopter.
• No significant correlations were found between the I4e isopter and ERG amplitudes, though some implicit times showed negative correlations.

Conclusions:

• The largest Goldmann visual field isopter (V4e) strongly correlates with standard ERG amplitudes in BCR.
• These findings highlight the potential of ERG as an objective tool for monitoring BCR activity and visual function.