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what does the iris and ciliarz body contain?
what is the funciton of the riris
what is the pupillary constricots muslce?
thas is the pupillary dilator muslce?
what happens if the ciliary body contracts?
1 cornea
2 pupillarz constictor muslce
3 posteror chamber
4 pupilarz dilator muscle
5 canal of schlemm
6 ciliarz body and muscle
7 suspensory ligament
8 sclera
9 choroid
10 ora serrata
11 lens
12 vitreous body
The iris and ciliary body are specialised parts of the choroid layer of the eye. They contain smooth muscle fibres under autonomic control
The iris serves to adjust the size of the pupil, through which light is admitted to the eye. Its main function, therefore, is to adapt the eye to variations in the amount of ambient light.
The pupillary constrictor muscle consists of circularly arranged fibres. It is antagonised by the radial fibres of the pupillary dilator muscle.
The lens is attached to the ciliary body by the suspensory ligament. Changes in shape of the lens alter the effective focal length of the eye, allowing sharp images of close or distant objects to be formed on the retina (accommodation). When the ciliary muscles contract, the lens becomes more convex, bringing close objects into focus.
2 pupillarz constictor muslce
3 posteror chamber
4 pupilarz dilator muscle
5 canal of schlemm
6 ciliarz body and muscle
7 suspensory ligament
8 sclera
9 choroid
10 ora serrata
11 lens
12 vitreous body
The iris and ciliary body are specialised parts of the choroid layer of the eye. They contain smooth muscle fibres under autonomic control
The iris serves to adjust the size of the pupil, through which light is admitted to the eye. Its main function, therefore, is to adapt the eye to variations in the amount of ambient light.
The pupillary constrictor muscle consists of circularly arranged fibres. It is antagonised by the radial fibres of the pupillary dilator muscle.
The lens is attached to the ciliary body by the suspensory ligament. Changes in shape of the lens alter the effective focal length of the eye, allowing sharp images of close or distant objects to be formed on the retina (accommodation). When the ciliary muscles contract, the lens becomes more convex, bringing close objects into focus.
