Comparison of rd10 and wt RPE at young ages. Four metrics obtained in CellProfiler were studied for potential differences. These included cell area, cell density, solidity, and extent. The definitions of solidity and extent are diagrammed. No differences in the averaged cell area or cell density were detected comparing rd10 to WT at P30, P45, or P60. The solidity and extent of rd10 RPE cells were reduced compared to WT at all three ages.