Bigness is in the eye of the beholder.
D000065:Accommodation, Ocular; D000293:Adolescent; D000328:Adult; D000337:Aerospace Medicine; D000360:Afterimage; D000367:Age Factors; D000368:Aged; D001341:Autonomic Nervous System / Q000502:physiology; D003623:Dark Adaptation; D004215:Distance Perception / Q000502:physiology; D006801:Humans; D008875:Middle Aged; D009903:Optical Illusions / Q000502:physiology; D010470:Perceptual Masking; D012160:Retina / Q000502:physiology; D012858:Size Perception / Q000502:physiology*; D014792:Visual Acuity; D014794:Visual Fields