Table 1. The standard deviations in the depth settings, corrected for idiosyncratic scalings, the depth range, and the number of resolved depth layers in the near range, for all observers.

Observer	Standard deviation	Range	Layers
AD	0.048	1.07	22.2
EP	0.041	1.01	24.5
JK	0.022	0.83	36.9
JW	0.020	0.99	50.2
KT	0.020	0.57	28.6
ML	0.017	0.90	54.5
MS	0.023	0.71	30.5