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WorksheetsCornea
Total questions: 20
Worksheet time: 11mins
What is the principle function of Cornea?
provide the bulk refractive error of the eye
to maintain the shape of the eye ball
to control light from entering the eye
to be able scatter light
Cornea is vascular. True or False
True
False
which part of the cornea is thicker?
centre
periphery
peri central
What is the refractive index of cornea
1.374
1.375
1.376
1.377
cornea is described as having how many layers?
1
3
5
7
which of the following are NOT a part of cornea epithelium
Wing cell layer
Basal cell layer
surface layer
Bowmans layer
Basal cell layers are anchored to the basement membrane by
mitochondria
desmosomes
hemidesmosome
filaments
which cell layer forms the bulk of corneal epithelium?
basal layer
wing cell layer
surface cell layer
basement layer
What is the function of microvilli found on surface cell layers?
to trap dust from tears
to stabilize the tear layer
to defend against foreign body
to get a better grip
Which of the following layer can you find mitochondria?
basal cell layer
wing cell layer
tear layer
surface layer
What is the main function of corneal epithelium?
refracting light
reflecting light
maintainance of eyeball shape
maintainance of transperancy
Injuring the bowman's membrane causes Opaque scaring.
TRUE
FALSE
what is the function of evenly spaced collagen fibrils in the stroma layer?
forming a barrier for organism and water
regulates cell activity
maintain transparency of cornea
regenerate the cornea
Which of the following cells IS NOT found in stroma
keratocytes
Lymphocytes
erythrocytes
microphages
Which of the following is NOT a special features of Descement membrane?
barrier to in deep perforations
Never regenerates
Curls towards Aq if disrupted
shows elastic tendencies
The active transportation of material from anterior chamber to stroma in Corneal endothelium would maintain the
corneal transparency
corneal elasticity
corneal hydration
corneal curvature
corneal endothelial cells loss will not be replaced by cell division but replaced by adjacent cell spreading to fill the gaps .
TRUE
FALSE
Cornea can become vascular in which kind of condition? (more than 1 answer)
Infection
corneal hypoxia
trauma
dry eyes
Which corneal layer does not have abundance nerve supply?
Epithelium
Endothelium
Stroma
Descement membrane
permanent damage to the innervation of the cornea may cause
keratitis
corneal degeneration
corneal ulcer
corneal scarring
