Question: intrinsic muscles of the eye

Answer: sphincter pupillae (circular)

dilator pupillae (radial)

cilary muscles

Question: bright light intrinsic muscles

Answer: radial contract

circular relax

pupil constrict

Question: dim light

Answer: radial relax

circular contract

pupil dilate

Question: distant object

Answer: ciliary muscles relax

thin lens

Question: near object

Answer: ciliary muscle contract

lens rounded, fat, refract light