Abstract
The visual cliff apparatus was used to investigate depth perception in 5 strains of mice. Positive responses indicative of visual depth discrimination were obtained in 4 strains (A/J:SM/J:C57BL:6J/C57BL/10J); the fifth strain (C3H/HeJ), with retinal degeneration, gave almost equal negative and positive reactions and showed no avoidance of the visual cliff or side preference. Depth perception was therefore absent in this strain. No significant differences between strains with pigmented and non-pigmented retinas were obtained with the apparatus and techniques employed.
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