Lab 15: Eye Muscles, Optic Pathway, Tunic

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Last updated 2:32 AM on 7/16/26
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25 Terms

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Medial rectus

Moves eye medially (adduction).

<p>Moves eye <strong>medially</strong> (adduction).</p>
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Lateral rectus

Moves eye laterally (abduction).

RED SQUARE.

<p>Moves eye <strong>laterally</strong> (abduction).</p><p>RED SQUARE.</p>
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Superior rectus

Moves eye up and medially.

<p>Moves eye <strong>up</strong> and <strong>medially.</strong></p>
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Inferior rectus

Moves eye down and medially.

<p>Moves eye <strong>down</strong> and <strong>medially.</strong></p>
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Superior oblique

Moves eye down and laterally.

<p>Moves eye <strong>down</strong> and <strong>laterally.</strong></p>
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Inferior oblique

Moves eye up and laterally.

<p>Moves eye <strong>up</strong> and <strong>laterally.</strong></p>
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Lateral rectus

What muscles is used when LOOKING LEFT?

<p>What muscles is used when LOOKING LEFT?</p>
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Medial rectus

What muscles is used when LOOKING RIGHT?

<p>What muscles is used when LOOKING RIGHT?</p>
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Optic nerve

Carries visual information from each eye.

<p>Carries visual information from each eye.</p>
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Optic chiasm

Some nerve fibers cross to the opposite side.

<p>Some nerve fibers cross to the opposite side.</p>
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Optic tract

Carries visual information to the brain.

<p>Carries visual information to the brain.</p>
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Sclera

Tough white outer layer.

Protects the eye.

(FIBROUS TUNIC)

<p>Tough white outer layer.</p><p>Protects the eye.</p><p>(FIBROUS TUNIC)</p>
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Cornea

Clear front of the eye.

Bends (refracts) light.

(FIBROUS TUNIC)

<p>Clear front of the eye.</p><p>Bends (refracts) light.</p><p>(FIBROUS TUNIC)</p>
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Choroid

Contains blood vessels.

Nourishes the eye.

(VASCULAR TUNIC)

<p>Contains blood vessels.</p><p>Nourishes the eye.</p><p>(VASCULAR TUNIC)</p>
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Ciliary body

Changes lens shape for focusing.

(VASCULAR TUNIC)

<p>Changes lens shape for focusing.</p><p>(VASCULAR TUNIC)</p>
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Iris

Colored part of the eye.

Controls pupil size.

(VASCULAR TUNIC)

<p>Colored part of the eye.</p><p>Controls pupil size.</p><p>(VASCULAR TUNIC)</p>
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Pupil

Opening that lets light enter.

(VASCULAR TUNIC)

<p>Opening that lets light enter.</p><p>(VASCULAR TUNIC)</p>
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Retina

Contains photoreceptors.

Converts light into nerve signals

(NEURAL TUNIC)

<p>Contains photoreceptors.</p><p>Converts light into nerve signals</p><p>(NEURAL TUNIC)</p>
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Macula lutea

Area of sharp central vision.

(NEURAL TUNIC)

<p>Area of sharp central vision.</p><p>(NEURAL TUNIC)</p>
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Fovea centralis

Sharpest vision.

Highest cone density

(NEURAL TUNIC)

<p>Sharpest vision.</p><p>Highest cone density</p><p>(NEURAL TUNIC)</p>
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Optic disc

Blind spot where optic nerve exits.

(NEURAL TUNIC)

<p>Blind spot where optic nerve exits.</p><p>(NEURAL TUNIC)</p>
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Fibrous tunic, vascular tunic, neural tunic

What are the three TUNICS?

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Sclera, cornea

What is in the FIBROUS TUNIC (OUTER LAYER)?

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Choroid, ciliary body, iris, pupil

What is in the VASCULAR TUNIC (MIDDLE LAYER)?

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Retina, macula lutea, fovea centralis, optic disc

What is in the NEURAL TUNIC (INNER LAYER)?