| spatial visual acuity of the falcon, falco berigora: a behavioural, optical and anatomical investigation. | in the brown falcon the relationship between acuity, as measured using a task designed to test minimum-separable acuity, and luminance was investigated as well as the possible determinants of that relationship. the maximum acuity was 73 c/deg and was found to be resistant to decreases in luminance. maximum behavioural acuity corresponds closely with the maximum anatomical resolving power of the eye, though it is postulated that, in the first instance, acuity is optically constrained. the flat ac ... | 1987 | 3445475 |