| gecko vision-visual cells, evolution, and ecological constraints. | geckos comprise both nocturnal and diurnal genera, and between these categories there are several transitions. as all geckos depend on their visual sense for prey capture, they are promising subjects for comparison of morphological modifications of visual cells adapted to very different photic environments. retinae of 22 species belonging to 15 genera with different activity periods are examined electron microscopically. scotopic and photopic vision in geckos is not divided between "classical" r ... | 2000 | 11279363 |