• reptiles
  • This membrane is present in many other reptiles, but is unique in crocodiles because it is semi-transparent and acts as goggles in improve eyesight when hunting and prevents eye damage. (wikipedia.org)
  • structures
  • Intraocular structures are normal, and vision is unaffected unless the nictitating membranes protrude to the extent that they cover the pupil. (maxshouse.com)
  • The posterior segment is the back five-sixths of the eye that includes the anterior hyaloid membrane and all of the optical structures behind it: the vitreous humor, retina, choroid, and optic nerve. (wikipedia.org)