In ERM evaluation, which imaging modality assesses macular structure?

• A. Mac OCT
• B. Fluorescein angiography
• C. Visual field testing alone
• D. Intraocular pressure measurement

Answer: (A)

Assessing macular structure in an ERM relies on an imaging method that reveals the retina’s architecture in detail. Macular OCT provides high-resolution cross-sectional images of the retina, showing the epiretinal membrane on the inner surface, how it exerts traction, and the resulting changes in the foveal contour and retinal layers. This information is crucial for planning surgery and predicting visual outcomes. Fluorescein angiography maps blood flow and leakage but does not show the fine macular microstructure. Visual field testing assesses function, not anatomy, and intraocular pressure measurement reflects pressure, not structural details. So, macular OCT best assesses macular structure in ERM evaluation.