Anatomy of the Eye (Part 2)

Among the organs of the visual system are the eyes. These organs are responsible for providing living organisms with vision, which permits them to receive and process visual detail as well as enable several photoreactive processes independent of vision. The eyes detect light and convert it to electrical impulses in neurons.

Take this quiz to learn about the anatomy of the eye and its functions.

  • Question of

    Back two-thirds of the eye, which include the anterior hyaloid membrane and other optical structures.

    • Posterior segment
    • Superior oblique muscle
    • Conjunctiva
    • Anterior chamber (AC)

    Correct Wrong

    As the back two-thirds of the eye, the posterior segment consists of the anterior hyaloid membrane and all the optical structures behind it: the vitreous humor, retina, choroid, and optic nerve.

  • Question of

    Junction between the retina and ciliary body that is serrated.

    • Ora serrata
    • Iris
    • Central retinal vein
    • Central retinal artery

    Correct Wrong

    Between the retina and the ciliary body there is a serrated junction called the ora serrata. This is where the simple, non-photosensitive ciliary body transitions into the complex, multilayered, photosensitive retina.

  • Question of

    The eye’s middle layer controls accommodation for viewing objects at varying distances.

    • Ciliary muscle
    • Fovea centralis
    • Inferior rectus muscle
    • Posterior segment

    Correct Wrong

    A ciliary body is a ring of tissue that surrounds the lens. Ciliary muscles are smooth muscle fibers in the ciliary body that help control the shape of the lens. On the posterior surface of the lens are ciliary processes containing capillaries. Capillaries secrete aqueous humor into the anterior segment of the eyeball.

  • Question of

    A ring of fibrous strands forming a little band that connects the ciliary body.

    • Ciliary zonule
    • Ciliary muscle
    • Optic nerve
    • Optic disc

    Correct Wrong

    An anchoring structure of the ciliary body to the lens is the ciliary zonule, a fibrous ring. In addition to anchor muscles that shape the lens to alter focus, it also contains structures that maintain the position of the lens along the optical path.

  • Question of

    A circular lymphatic-like vessel in the eye also known as the scleral venous sinus.

    • Schlemm’s canal
    • Vorticose veins
    • Superior rectus muscle
    • Anterior chamber (AC)

    Correct Wrong

    The Schlemm's canal is a lymphatic-like vessel in the eye that drains aqueous humor from the eye into the systemic circulation to maintain fluid balance.

  • Question of

    Folds of vascular tissue on the inner surface of the ciliary body that produce the aqueous humor.

    • Ciliary processes
    • Anterior chamber (AC)
    • Central retinal artery
    • Macula lutea

    Correct Wrong

    In the lens, ciliary processes are arranged along the margin, forming a frill behind the iris and around the margin. Aqueous humour is produced by ciliary processes.

  • Question of

    In the primary position (looking straight ahead), this eye muscle’s primary function is elevation.

    • Superior rectus muscle
    • Medial rectus muscle
    • Inferior rectus muscle
    • Ora serrata

    Correct Wrong

    This area is innervated by the superior division of the cranial nerve III (oculomotor nerve). The superior rectus muscle's primary function (looking straight ahead) is elevation, although it also contributes to intorsion and adduction.

  • Question of

    This extraocular muscle adducts the eyeball to look medially.

    • Medial rectus muscle
    • Superior oblique muscle
    • Optic nerve
    • Inferior oblique muscle

    Correct Wrong

    The medial rectus muscle adducts the eyeball to look medially.

  • Question of

    This extraocular muscle rotates eye to look down.

    • Inferior rectus muscle
    • Superior oblique muscle
    • Anterior chamber (AC)
    • Superior rectus muscle

    Correct Wrong

    The inferior rectus muscle helps extort the eye, depresses it, and adducts it. When the eye is fully abducted, the inferior rectus muscle is the only muscle that can depress the pupil.

  • Question of

    This extraocular muscle rotates eye to look laterally.

    • Lateral rectus muscle
    • Medial rectus muscle
    • Inferior rectus muscle
    • Superior oblique muscle

    Correct Wrong

    The lateral rectus muscle is responsible for the lateral movement of the eyeball, specifically abduction.