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[[Image:round_yellow_rat_snake_pupil.jpg|300px|thumb|right|'''Round pupil of a [[Rat snake]]''' - © RVC]]

[[Image:round_yellow_rat_snake_pupil.jpg|300px|thumb|right|'''Round pupil of a [[Rat snake]]''' - © RVC]]

[[Image:slit_palm_pit_viper_pupil.jpg|300px|thumb|right|'''Slit pupil of a [[Pit viper]]''' - © RVC]]

[[Image:slit_palm_pit_viper_pupil.jpg|300px|thumb|right|'''Slit pupil of a [[Pit viper]]''' - © RVC]]

==Physiology==

==Physiology==

Accommodation is similar to mammals with changes in the shape of the lens. Unlike mammals, this is under voluntary control by the action of the striated radial muscles within the ciliary body. Mammalian mydriatics therefore do not work in reptiles.  However, d-tubocurarine has been used for mydriasis in reptiles.  Reptiles have a rapid direct light reflex but no consensual light reflex.

Accommodation is similar to mammals with changes in the shape of the lens. Unlike mammals, this is under voluntary control by the action of the striated radial muscles within the ciliary body. Mammalian mydriatics therefore do not work in reptiles.  However, d-tubocurarine has been used for mydriasis in reptiles.  Reptiles have a rapid direct light reflex but no consensual light reflex.

[[Category:Snake Anatomy]]

[[Category:Snake Anatomy]]

[[Category:Snake_Physiology]]

[[Category:Snake_Physiology]]