Relation between refractive error and the spread of the image on the cat's retina.
D000818:Animals; D002415:Cats; D003720:Densitometry; D005654:Fundus Oculi / Q000502:physiology; D007909:Lenses; D008266:Macula Lutea / Q000502:physiology; D009474:Neurons / Q000502:physiology; D009887:Ophthalmoscopy; D055095:Optics and Photonics; D010781:Photography; D012029:Refraction, Ocular; D012160:Retina / Q000502:physiology*