Correct Answer - C Ans. is'c'i.e., Constrictor pupillae [Ref: | Anatomy embryology histology videos & books

Correct Answer - C
Ans. is'c'i.e., Constrictor pupillae [Ref: Gray's 39h/e p. 7101
Intraocular muscles (intraocular muscles)
→ Intraocular muscles are -

A) Muscles of iris
→ There are two types of muscles in iris that control the size
of pupil:

1. The iris sphinctor or constrictor pupillae (circular muscles):-
These muscles are innervated by the postganglionic parasympathetic fibres from Edinger westphal nucleus via 3'd nerve and ciliary ganglion. These muscles cause constriction of pupil (Miosis).

2. The iris dilator or dilator pupillae (radial muscles) → These
muscles are innervated by sympathetic system via postganglionic sympathetic fibres for the dilator pupillae from
neurons in the superior cervical ganglion. These muscles cause
pupillary dilatation (mydriasis).

B) Ciliary muscles;--> these are innervated by the postganglionic
parasympathetic fibers from EWN via 3rd nerve and ciliary ganglion. These muscles help in accommodation.

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