Fig. 1From: Morphology of the snake spectacle reflects its evolutionary adaptation and developmentOptical coherence tomography images of the spectacle (arrow) and anterior eye segment of two snakes. Subspectacular space (SSS), cornea (C), anterior chamber (AC), lens (L). Bar = 200 μm. a: Green anaconda (Eunectes murinus), an aquatic snake with an average spectacle thickness of 156 μm. b: Brown tree snake (Boiga irregularis), an arboreal snake with an average spectacle thickness of 102 μmBack to article page