Abstract

In the compound eye of flies, the divergence angles between the visual axes of adjacent rhabdomeres are systematically larger than the corresponding interommatidial angles: neurommatidia are focused to distances of about 3---6 mm from the cornea surface. This special arrangement of rhabdomeres is considered as an adaptation of receptor cells R1---R6 for high absolute light sensitivity and, in addition, may possibly aid in estimating distances of visual objects.

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