Fig. 2.

Effects of monocular deprivation and rearing in darkness. A, Effects of painting one eye (monocular deprivation) on the optic lobes. Except for the lobula, the neuropils underneath the open eye had a larger volume than under the occluded eye if the flies were kept in LD conditions (striped bars;n = 130). As a control for the effects of painting, some of the monocularly painted flies were reared in DD (solid bars; n = 80). Thus, the painting itself did not reduce neuropil volume. B, Rearing in DD (n = 24) gave a more obvious volume difference than monocular deprivation in the LD cycle (n = 37).