Changes

==Eyelids==

==Eyelids==

In some chameleon species, the eyelids have fused to produce a circular, immobile and transparent dermal aperture called a spectacle. It create an impervious barrier to topically applied medications. Lizard species lacking a spectacle have a well developed, semi-transparent, highly mobile third eyelid which is also called the 'nictating membrane'; this membrane can close across the eye even while the eyelids remain open.

In some chameleon species, the eyelids have fused to produce a circular, immobile and transparent dermal aperture called a spectacle. It create an impervious barrier to topically applied medications. Lizard species lacking a spectacle have a well developed, semi-transparent, highly mobile third eyelid which is also called the 'nictitating membrane'; this membrane can close across the eye even while the eyelids remain open.

==The pupil==

==The pupil==

* Mader, D.R. (2005). ''Reptile Medicine and Surgery''. Saunders. pp. 1264. ISBN 072169327X

* Mader, D.R. (2005). ''Reptile Medicine and Surgery''. Saunders. pp. 1264. ISBN 072169327X

* Girling, S.J. (20040. ''BSAVA Manual of Reptiles''. British Small Animal Veterinary Association. pp. 350. ISBN 0905214757

* Girling, S.J. (2004). ''BSAVA Manual of Reptiles''. British Small Animal Veterinary Association. pp. 350. ISBN 0905214757