Autofluorescence in the retina of a snail, Helix aspersa.
D000818:Animals; D005453:Fluorescence; D006372:Helix, Snails / Q000502:physiology*; D010786:Photoreceptor Cells / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology*; D014466:Ultraviolet Rays; D014801:Vitamin A / Q000502:physiology
D012168:Retinal Pigments; D014801:Vitamin A