OCT Tip 228 was originally published on January 1st, 2022.
This arthritis patient presents with blurred vision. Why?
Analysis
Here there is significant thinning of the outer retinal layers. The outer retinal layer is thinned and the external limiting membrane is lost in certain areas. The ellipsoid zone is thready in the perifoveal area. The patient’s mERG showed areas of depression in the peri-foveal area (video).
As she was taking hydroxychloroquine for her arthritis, she was diagnosed with hydroxychloroquine toxicity.
In this tip's accompanying 11 min. video, we'll review:
- How to screen for hydroxychloroquine retinopathy on OCT
- mERG changes pertaining to hydroxychloroqhine toxicity
- When to suspect hydroxychloroquine toxicity
OCT Tip
In a patient with peritoneal outer retinal thinning a thorough drug history is a must to rule out toxicity.
Not receiving our tips yet? Subscribe to receive them straight to your inbox.
