title: Optical properties of photoreceptors.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001718:Birefringence; D003623:Dark Adaptation; D008027:Light; D009905:Optical Rotatory Dispersion; D055095:Optics and Photonics; D010786:Photoreceptor Cells; D012168:Retinal Pigments; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D012168:Retinal Pigments