NUSA 401 exam 4 |Questions with 100% correct
answers
5 structures of eye - ✔️✔️1. eyelid
2. conjunctiva
3. lacrimal gland
4.eye muscles
5. bony skull orbit
eyelid - ✔️✔️two moveable shades that further protect the eye from injury, strong light, and dust
conjunctiva - ✔️✔️exposed part of the eye; transparent protective covering
palpebral fissure - ✔️✔️is the elliptical open space between the eyelids
lower lid margin - ✔️✔️just at the limbus, the border between the cornea and sclera
canthus - ✔️✔️the corner of the eye, the angle where the lids meet
the inner canthus - ✔️✔️the caruncle is a small, fleshy mass containing sebaceous glands
Within the upper lid - ✔️✔️tarsal plates are strips of connective tissue that give it shape
tarsal plates - ✔️✔️contain the meibomian glands, modified sebaceous glands that secrete an
oily lubricating material onto the lids
, lacrimal apparatus - ✔️✔️provides constant irrigation to keep the conjunctiva and cornea moist
and lubricated
extraocular muscles - ✔️✔️stimulated by 3 cranial nerves, VI, IV, III
oculomotor nerve (CN III) - ✔️✔️controls levator palpebrae superioris (which elevates and
retracts the upper eyelid)
all extraocular muscles except for the superior oblique muscle (CN IV) and the lateral rectus
muscle (CN VI)
The superior oblique - ✔️✔️the only muscle innervated by the trochlear nerve (CN IV)
The lateral rectus muscle - ✔️✔️the only muscle innervated by the abducens nerve (CN VI)
Ophthalmoscope - ✔️✔️enlarges view of eye so that you can inspect the media or anterior
chamber, lens, and vitreous and the ocular fundus or internal surface of retina
it directs a beam of light from pupil to light up inner structures
wrinkling and drooping - ✔️✔️skin losses elasticity (normal sign of aging in eye)
muscle and fat atrophy - ✔️✔️eyes may appear sunken and bulging at lower lids if fat herniates
(normal sign of aging in eye)
lacrimal glands involute - ✔️✔️decreased tear production; feeling of dryness and burning (normal
sign of aging in eye)
answers
5 structures of eye - ✔️✔️1. eyelid
2. conjunctiva
3. lacrimal gland
4.eye muscles
5. bony skull orbit
eyelid - ✔️✔️two moveable shades that further protect the eye from injury, strong light, and dust
conjunctiva - ✔️✔️exposed part of the eye; transparent protective covering
palpebral fissure - ✔️✔️is the elliptical open space between the eyelids
lower lid margin - ✔️✔️just at the limbus, the border between the cornea and sclera
canthus - ✔️✔️the corner of the eye, the angle where the lids meet
the inner canthus - ✔️✔️the caruncle is a small, fleshy mass containing sebaceous glands
Within the upper lid - ✔️✔️tarsal plates are strips of connective tissue that give it shape
tarsal plates - ✔️✔️contain the meibomian glands, modified sebaceous glands that secrete an
oily lubricating material onto the lids
, lacrimal apparatus - ✔️✔️provides constant irrigation to keep the conjunctiva and cornea moist
and lubricated
extraocular muscles - ✔️✔️stimulated by 3 cranial nerves, VI, IV, III
oculomotor nerve (CN III) - ✔️✔️controls levator palpebrae superioris (which elevates and
retracts the upper eyelid)
all extraocular muscles except for the superior oblique muscle (CN IV) and the lateral rectus
muscle (CN VI)
The superior oblique - ✔️✔️the only muscle innervated by the trochlear nerve (CN IV)
The lateral rectus muscle - ✔️✔️the only muscle innervated by the abducens nerve (CN VI)
Ophthalmoscope - ✔️✔️enlarges view of eye so that you can inspect the media or anterior
chamber, lens, and vitreous and the ocular fundus or internal surface of retina
it directs a beam of light from pupil to light up inner structures
wrinkling and drooping - ✔️✔️skin losses elasticity (normal sign of aging in eye)
muscle and fat atrophy - ✔️✔️eyes may appear sunken and bulging at lower lids if fat herniates
(normal sign of aging in eye)
lacrimal glands involute - ✔️✔️decreased tear production; feeling of dryness and burning (normal
sign of aging in eye)
