Electroretinographic findings in retinal vasculitis

Area of Science:

• Ophthalmology
• Retinal Diseases
• Electrophysiology

Background:

• Retinal vasculitis (RV) is an inflammatory condition affecting retinal blood vessels.
• Understanding the relationship between clinical findings and functional vision is crucial for managing RV.
• Electroretinography (ERG) provides objective measures of retinal function.

Purpose of the Study:

• To correlate electroretinographic (ERG) responses with clinical and angiographic findings in patients with retinal vasculitis (RV).
• To establish a grading system for ERG and fluorescein angiography (FFA) to assess RV severity.
• To investigate the impact of systemic disease on ERG outcomes in RV.

Main Methods:

• Retrospective review of medical records for RV patients undergoing FFA and full-field ERG (ffERG) within one month.
• FFA grading using the Angiography Scoring for Uveitis Working Group (0-40 scale).
• Novel ffERG grading system assessing individual wave timing/amplitude and a general score (0-6).

Main Results:

• 20 patients (34 eyes) were analyzed; mean age 43.9 years, 70% female.
• Mean FFA score was 12.6, median general ffERG score was 5.
• FFA scores weakly correlated with delayed cone b-wave and flicker timing.
• Vitreous haze moderately correlated with delayed cone b-wave and flicker timing.
• Underlying systemic disease was linked to poorer ffERG responses.

Conclusions:

• Retinal vasculitis (RV) is not frequently associated with severe global retinal dysfunction.
• Higher FFA scores and vitreous haze grading showed weak but significant correlations with cone-generated ffERG responses.
• ERG can provide valuable functional insights in RV, especially when correlated with angiographic and clinical data.