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. Author manuscript; available in PMC: 2023 May 1.

Published in final edited form as: Ophthalmology. 2022 Jan 3;129(5):571–584. doi: 10.1016/j.ophtha.2021.12.017

Figure 1. — A-G, Nuclear cataract grading by comparison of 45-degree slit-lamp photograph with 7 standard photographs: 1 (no opacity) to 7 (extremely severe opacity). A—G, Standard photographs 1 through 7. H, Cortical cataract grading by percentage area involvement of the central 2 circles of the grid (5-mm diameter circular area) on retroillumination photograph. Left: Retroillumination photograph of cortical opacity. Right: Retroillumination photograph of cortical opacity with overlying grid. The cortical opacity occupies 22% of the central 2 circles of the grid. I, Posterior subcapsular cataract grading by percentage area involvement of the central 2 circles of the grid (5-mm diameter circular area) on retroillumination photograph. Left: Retroillumination photograph of posterior subcapsular opacity. Right: Retroillumination photograph of posterior subcapsular opacity with overlying grid. The posterior subcapsular opacity occupies 15% of the central 2 circles of the grid.

Figure 1. — A-G, Nuclear cataract grading by comparison of 45-degree slit-lamp photograph with 7 standard photographs: 1 (no opacity) to 7 (extremely severe opacity). A—G, Standard photographs 1 through 7. H, Cortical cataract grading by percentage area involvement of the central 2 circles of the grid (5-mm diameter circular area) on retroillumination photograph. Left: Retroillumination photograph of cortical opacity. Right: Retroillumination photograph of cortical opacity with overlying grid. The cortical opacity occupies 22% of the central 2 circles of the grid. I, Posterior subcapsular cataract grading by percentage area involvement of the central 2 circles of the grid (5-mm diameter circular area) on retroillumination photograph. Left: Retroillumination photograph of posterior subcapsular opacity. Right: Retroillumination photograph of posterior subcapsular opacity with overlying grid. The posterior subcapsular opacity occupies 15% of the central 2 circles of the grid.