Which ERG is designed to map retinal function across multiple locations?

Which ERG is designed to map retinal function across multiple locations?

• A. Pattern ERG
• B. Full-field ERG
• C. Multifocal ERG
• D. Electroretinography

Answer: (C)

MulticLocation mapping of retinal function is achieved by multifocal ERG. It uses a stimulus display made of many small elements that flicker in a pseudorandom sequence, allowing responses from each local area of the retina to be isolated. The collected signals are compiled into a topographic map, showing how different retinal regions—like the macula and surrounding retina—are functioning. This makes it ideal for detecting localized dysfunction that a global, whole-retina measure might miss. By contrast, pattern ERG focuses on responses from the inner retina and macular region using a patterned checkerboard stimulus but does not produce a full topographic map. Full-field ERG measures the overall, summed response of the entire retina, giving global function rather than location-specific detail. Electroretinography is the broad term for tests of retinal function, encompassing these different approaches.

MulticLocation mapping of retinal function is achieved by multifocal ERG. It uses a stimulus display made of many small elements that flicker in a pseudorandom sequence, allowing responses from each local area of the retina to be isolated. The collected signals are compiled into a topographic map, showing how different retinal regions—like the macula and surrounding retina—are functioning. This makes it ideal for detecting localized dysfunction that a global, whole-retina measure might miss. By contrast, pattern ERG focuses on responses from the inner retina and macular region using a patterned checkerboard stimulus but does not produce a full topographic map. Full-field ERG measures the overall, summed response of the entire retina, giving global function rather than location-specific detail. Electroretinography is the broad term for tests of retinal function, encompassing these different approaches.