Special Senses

Ability to focus for close vision (less than 20 feet).

Accommodation

Blurred vision, resulting from an equal curvatures of the lens or cornea.

Astigmatism

clouding of the lens, resulting in loss of sight.

Cataract

Inflammation of the mucosal lining the eyelids and covering the anterior part of the eyeball is called ______.

Conjunctivitis

Media movement of the eyes during focusing on close objects.

Convergence

Attached to the eyes are the ______ muscles that allow us to direct our eyes toward a moving object.

Extrnsic

The anterior aspect of each eye is protected by the ______, which has eyelashes protecting from their edges.

Eyelids

Condition of increasing pressure inside the eye, resulting from block to drainage of aqueous humor.

Glaucoma

Lateral rectus action

Moves eye laterally

Conjunctiva secretes

Mucus

Nearsightedness

Myopia

Inability to see while in the darker; often a result of vitamin a deficiency.

Night blindness

Closely associated with the lashes or oil secreting glands called ______ that help to lubricate the eyes.

Tarsal glands

Superior oblique action

Turns eyeball inferiorly and laterally

accommodation

ability to focus for close vision (under 20 feet)

astigmatism

blurred vision, resulting from unequal curvatures of the lens or cornea

normal vision

emmetropia

hyperopia

inability to focus well on close objects (farsightedness)

convergence

medial movement of the eyes during focusing on close objects

mypoia

nearsightedness

photopupillary (reflex)

reflex constriction of pupils when they are exposed to bright light

light bending

refraction

Tarsal glands secrete

sebaceous gland - Sebum

Inferior rectus action

turns eyeball inferiorly and medially

Medial rectus action

turns eyeball medially

Inferior oblique action

turns eyeball superiorly and medially

superior rectus action

turns eyeball superiorly and medially

Inability to focus well on close objects; farsightedness.

Hyperopia

Reflex constriction of pupils when they are exposed to bright light.

Photopupillary (reflex)

Lacrimal glands secrete

Salt water and lysozyme