Poi Sensei · poisensei.com

Read the ERG through the 10 retinal layers

A one-page guide for ophthalmologists and residents: which layer makes which wave, and what disappears when that layer fails. The a-wave, b-wave and OPs with the cell behind each one. Flat, negative and cone-type patterns and the layers they point to. And the dark-adaptation trap to check before you report "negative".