DIS - Angle Closure Glaucoma I - Week 5 Flashcards
Define primary angle closure.
Caused by narrow angles having intermittent periods of closure
What is sudden total angle closure called?
Acute angle closure glaucoma
Describe what is meant by a primary angle closure suspect. What should be done with these individuals (including review schedule)?
PTM is not visible in 2 mirrors
Consider risk factors and work up for primary angle closure glaucoma
Review closely 6/12 if high risk
Describe what is meant by primary angle closure (clinically, not mechanisms). What is thought to be happening with the angle?
Same criteria as with a suspect - PTM not visible in 2 mirrors, with the addition of ischaemic iris changes
Thought the angle is slowly zipping up
Do ischaemic iris changes need surgical intervention or does it make no difference?
Needs surgery
What percentage of primary angle closures convert to primary angle closure glaucoma in chinese people? Does this change with peripheral laser iridotomy?
25% converts to primary angle closure glaucoma despite peripheral laser iridotomy
Clinically, what is meant by primary angle closure glaucoma (6)?
Same criteria as with primary angle closure, with the addition of:
High IOP
RNFL loss or
NRR loss or
ON loss or
VF loss
What is the presumptive diagnosis of acute angle closure glaucoma based on?
the presence of multiple signs and symptoms
List 6 features of ischaemic iris changes, including one for the lens (6 total).
Peripheral anterior synechiae
Increased pigment in the PTM (G2+)
High IOP (>24mmHg)
Whorling (distortion of radial fibres)
Iris atrophy
Glaucomflecken
At what age range does risk for primary angle closure become significant?
50-70
Which gender is at a higher risk of rimary angle closure and by how much?
Females - 2x males, especially in younger populations
Does family history of primary angle closure increase individual risk?
Yes
Is there greater risk of acquiring primary angle closure in a fellow eye after getting it in one eye or is the risk independent?
Yes
What race is at a greater risk of primary angle closure?
Asians - especially east asians
List three ocular risk factors for primary angle closure.
Narrow angle
Shallow anterior chamber
Exfoliation