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There are many muscles in the eye that control it. The four major muscles are the superior and inferior rectus (control up and down movement) and the lateral and medial rectus (control outer and inner movement). There are also two minor muscles, namely the inferior oblique (controls motion up and out or "extorsion") and superior oblique (controls motion down and in or "intorsion").
In additional to muscle which control movement, the lens of the eye is attached to a muscle called the ciliary body which controls anatomic movements and shape/focusing power of the lens. As we get older, this process of focusing, or accommodation gets weaker and most adults over 40 require reading glasses (magnifiers).
Finally, the iris or colored part of the eye is a muscle which can contract and expand and control the amount of light which enters the eye in various illuminated environments.
Adam D Koenigsberg MD FACS
www.eyemusclesurgery.com
What else can I help you with?
What are the intrinsic eye muscles controlled by?
The iris and the ciliary muscle
Is the eye an involuntary muscle?
The intrinsic muscle are involunary and respond to light intensity and required focal langth without conscious intervention. The extrinsic muscle of the eye are volunary and move the eye to look around under conscious control. The eye itself is ofcourse not a muscle at all.
Why is it more of a strain on the intrinsic and extrinsic eye muscle to look at the close objects than at far objects?
extrinsic muscles are strained
What is the definition of intrinsic arteries of the eye?
The term intrinsic means essential in nature. They are necessary and needed.
What are the six intrinsic eye muscles?
The intrinsic muscles of the eye are the dilator (radial), the sphincter pupillae (circular) constrictor muscle and the ciliary muscle. The iris contains the dilator pupillae and the constrictor pupillae with antagonist effects on the diameter of the pupil. The ciliary muscle is a smooth muscle that, when contracted relaxes the suspensory ligament of the lens. Contraction of this muscle is part of the accommodation reflex and under the control of parasympathetic fibers that travel with cranial nerve 3.
What kind of Eye muscles are controlled by the autonomic nervous system?
intrinsic eye muscles are controlled by the autonomic nervous system
What does the inferior oblique muscle of the eye do?
The inferior oblique muscle of the eye, abducts, elevates and laterally rotates the eye
What muscle gives the eye its color?
The iris gives the eye it's color. It is not a muscle.
What is affected first when drinking eye muscle leg muscle or arm muscle?
eye muscles according to traffic school.
Which muscle closes the eye and produces blinking and squinting?
The Orbicularis oculi muscle squints the eye.
What is the composite sphincter muscle encircling each eye?
Orbicularis oculi is a wide flat muscle that encircles the eye.
What is the major intrinsic foot muscle located on the dorsal side of the foot?
There are two: the extensor digitorum (toes) brevis muscle and the extensor hallucis (big toe) brevis muscle.
