The nictitating membrane.
Persistent pupillary membrane is a condition where parts of a fetal membrane stay attatched to the eye after birth. It can cause cataracts.
The nictitating membrane is the transparent layer the covers the outside of a frogs eye. Frogs have a so-called Nictitating membrane, which they can slide over their eyes for protection. They do this while jumping and swimming.
It is called a nictating membrane.
The sensory of the membrane eye has the letters r,e,n,a,t, and i.
a flat, colored, ring-shaped membrane of the eye is called the iris
It is called the tympanic membrane and is used for hearing.
This is called the third eye lid. It will sweep the eye from time to time to clean it. It is also called a nictating membrane.
It's called a retina.
The clear curved membrane that covers the front of the eye is called the cornea. It also focuses light onto the retina.
The nictitiating membrane protects the eye so frogs can see in water.
The nictitating membrane is a third eye lid which moves horizontally over the eye. Its function is to protect the eye and clean the eyes. it is mostly functional in birds and reptiles. whereas it became a vestigial organ in most of the mammals. In fishes and amphibians also the nictitating membrane is present and here it reduces the friction with water.The nictitating membrane is a protective, semi-transparent third eyelid. It allows vision while giving the eye extra protection. In the case of frogs, the protection is needed when the frog is out of the water.
It is a thin lining over the eye of a frog which gives it extra protection