Receptors in the monochromat eye.
D000368:Aged; D003117:Color Vision Defects / Q000473:pathology*; D003623:Dark Adaptation; D005584:Fovea Centralis / Q000473:pathology; D006801:Humans; D008297:Male; D009474:Neurons; D010786:Photoreceptor Cells; D012160:Retina / Q000473:pathology*; D013053:Spectrophotometry; D014792:Visual Acuity