Conditions - CORNEA

Question 1

Corneal haze:

Answer 1

spacing of stromal fibrils is altered due
to edema or due to activated fibroblast, myofibroblast
cells (especially after PRK)

Question 2

Corneal layers

Answer 2

Cornea has 5 distinguished layers

1. Epithelium
2. Bowman’s layer
3. Stroma
4. Descemet’s membrane
5. Endothelium

Question 3

PTK (Phototherapeutic keratectomy )

Answer 3

the removal of superficial corneal opacities and surface irregularities

Question 4

Keratoconus

Answer 4

corneal
dystrophy due to localized
disruptions of Bowman’s
layer, stroma thins and
weakens and intraocular
pressure causes cornea to
bulge and take shape of a
cone

Question 5

Corneal edema

Answer 5

Over-hydration of cornea results in corneal edema loss of

transparency corneal haze

Question 6

DSEK:
• Descemet’s Stripping Endothelial
Keratoplast

Answer 6

corneal transplant
that replaces only the damaged cell cornea heals much
faster and stronger

Question 7

“penetrating keratoplasty”

or “PKP”,

Answer 7

cornea–all five layers– is removed
and replaced with healthy donor tissue. for the
treatment of damaged corneas
for many years.

Question 8

Hassall-Henle bodies:

Answer 8

thickening of Descemet’s membrane (DM) bulging
into anterior chamber near corneal periphery (common finding increases
with age)

Question 9

Guttata:

Answer 9

thickening of DM in central cornea is called guttata (indicative of
endothelial dysfunction)

Question 10

Contact lens effect:

Answer 10

pleomorphism and polymegathism was documented

after 6-years of GP lens or soft lens wear (cell density remain normal).

Question 11

Photorefractive keratectomy (PRK)

Answer 11

laser eye surgery procedures intended to correct a person’s vision, reducing dependency on glasses or contact lenses.

Question 12

Paradise of Vogt

Answer 12

Radial projections of fibrovascular
tissue in spoke like
fashion around corneal
periphery
• The interpalisade region contain
thickened epithelium, limbal
stem cells reside here

Question 13

• Limbal stem cell deficiency

Answer 13

• Loss of stem cells leading to
corneal neovascularization and
corneal opacity

Question 14

Pinguecula

:

Answer 14

• Slightly elevated mass of
modified conjunctival tissue
• Usually at 3 and 9 o’ clock • Change in submucosal layer • Epithelium unchanged

Question 15

Pterygium

:

Answer 15

• Fibrovascular, triangular over
-
growth of bulbar conjunctiva
•
onto cornea usually progressive
• Induces astigmatism and vision
change (drop in UCVA, BCVA)
• As it progress onto cornea, It
damages the corneal epithelium
as well as bowman’s layer is
compromised