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26 Cards in this Set
- Front
- Back
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Identify factors that give an underestimation of the IOP
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Thin mires, thin cornea, high myopia, >3D of WTR astigmatism
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pupil diameter smaller than __mm can cause general depression of VF?
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3mm
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What common glaucoma medication is not indicated in NVG?
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pilo/miotics - can worsen pressure by decreasing uvealscleral outflow.
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Pilocarpine causes myopia or hyperopia
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myopia
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What is the most common cause of trab failure?
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episcleral fibrosis (scarring of the bleb)
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ALT settings
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50um, 0.1sec, 700mW
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Suturelysis settings
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argon, 50um, 0.1sec, 700mW
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LPI settings
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for dark irides, pretreat Argon 400-800 mW, 50 um, 0.02 sec
treat YAG, 4-6 mJ |
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Iridoplasty settings
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"300-500" laser
argon, 300-500um, 300-500mW, 300-500mSec |
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Which has a higher closure rate, argon or Yag PI?
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argon has a higher late closure rate
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antifibrotic agents should be used cautiously in which group?
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young myopic patients - increased risk of hypotony
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Mechanism of colchicine
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affects collagen cross-linking, reducing scar formation
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What are the nerve findings in initial ACG?
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hyperemia & swelling
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In pt with increased IOP and scleral buckle, what can be done surgically?
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Tube from AC/PC to band/fibrosis "anterior tube shunt"
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In Tx of epithelial downgrowth?
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excision of involved iris and cryo to remaining tissue on cornea
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AC presentation of ghost cell glaucoma
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"candy stripe hyphema"
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Uveoscleral outflow accounts for what % of outflow facility?
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10-50%
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T or F chronic as well as acute changes to venous pressure have a 1 to 1 relation with the IOP
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F only acute. Chronic increase in VP can have decreased, increased or unchanged IOP
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What is the normal range for outflow facility
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0.22-0.28 uL/min/mmHg
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What is the cause of plateau iris?
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Forward display of ciliary processes
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Describe Grade IV vs. Grade I angle
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Grade IV is open and Grade I is narrow
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What VF pattern is most concerning for loss of central vision/fixation?
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Split fixation
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What is Thymoxamine and how is it useful in glaucoma evaluation?
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it is a selective alpha adrenergic antagonist. it causes miosis without causing increased outflow. It is used to differentiate between COAG and CMG with narrow angles. If there is a decrease in IOP after using it, a PI should be performed.
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Identify basic aspects of glaucoma genes
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GLC1... AD
GLC3... Congenital/AR |
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What are the criteria to be suspicious for glaucomatous loss in static perimetry?
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single point depression of 10dB or a cluster of 3 at 5dB
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Pediatric dose of acetazolamide
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15mg/kg/day divided in 3-4 doses
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