Conditions - IRIS

Question 1

Crypts of Fuchs

Answer 1

Large defects in the anterior border layer

are commonly seen as

Question 2

Blunt trauma to head or
eye can cause iris root to tear away known
as

Answer 2

“iridodialysis”

Question 3

Aniridia:

Answer 3

partial or
complete absence of
iris. High association
with glaucoma (75%) due to block angle

Question 4

Iris synechia:

Answer 4

abnormal attachment of
iris surface and another
structure (lens or
corneal endothelium or
trabecular meshwork,
TM)

Question 5

Posterior irido

-

Answer 5

lenticular synechiae
-the ring of pigment
deposits on the lens
.

Question 6

Pigment dispersion syndrome:

Answer 6

pigment granules shed from posterior
iris and dispersed into anterior
chamber. If deposit in TM may affect
aqueous outflow (pigmentary
glaucoma).

Question 7

Heterochromia

Answer 7

two iris are of
different color in the same person,
congenital (disruption of sympathetic
innervation) or sign of uveal
inflammation.

Question 8

Pseudoexfoliation syndrome&raquo_space; G

Answer 8

ring-like deposits on the
anterior lens located at the pupillary
margin.Debris can accumulate in the trabecular
meshwork resulting in an increase in IOP
for 50 % of affected eyes.
• Higher risk of secondary glaucoma

Question 9

Krunkenberg spindle&raquo_space; G

Answer 9

spindle on the
corneal endothelium
• Posterior iris rubbing against
zonules due to high concavity of
peripheral iris
• Higher risk of secondary glaucoma

Question 10

Iri(dec)tomy:

Answer 10

surgically a wedge
shape full thickness iris tissue is
removed

Question 11

Iri(do)tomy:

Answer 11

opening is made using
laser without excising the tissue
and muscle

Question 12

Iris blood supply

Answer 12

LPRA
ACA
MAJOR/MINOR ATRIAL CIRCLE
RADIAL VESSELS

Question 13

Iris Rubeosis

Answer 13

neovascularization of the iris or AC angle. Seen with ocular ischemia,
proliferative diabetic retinopathy. May cause secondary-angle closure glaucoma due to
occlusion of the trabecular meshwork.