Gonio 1 Flashcards
People without a crystalline lens usually have a ____ angle
Obtuse
When the peripheral iris is more convex the ACA is
More narrow
CB extends from ___ to ___
scleral spur to the ora serrata
outer portion of the CB lies along the sclera separated by
suprachoroidal space
Anterior insertion of the iris maybe produce a ___ angle recess known as ___.
Narrow angle
Pleateau iris
most posterior structure of ACA
CB
if the CB is visible at the root of the iris it’s an
open agle
posterior boundary of the corneoscleral meshwork
SS
anterior insertion of the longitudinal portion of the ciliary muscle
SS
appears as a bright white line, separates CB from TM
Scleral Spur (good landmark during gonio)
uveal meshwork is ___ layer of TM. Consists of rope like cords that extends from _____ to ____.
innermost
iris/CB to schwalbes line
cornealscleral meshwork is ___ layer of TM. Extends from ____ to ____
middle layer
scleral spur to schwalbes line
this layer of the TM consists of sheets of trabeculae with elliptical holes, that become smaller closer to schlemms canal
corneascleral meshwork
endothelial cells line this TM layer
corneoscleral
intertrabecular spaces of corneascleral TM communication with sclemms canal
communicate with each other but re not continuous
juxtacanalicular meshwork is the __ layer of TM. Located where?
outermost
adjacent to the inner wall of sclemms canal
this layer of TM has CT lined on either side by endothelium. What’s the difference between each side?
Jxtacanalicular layer
outer endothelial layer compromises inner wall of sclemms canal
inner endothelial is continuous w Trabecular endothelium
GREATEST RESISTANCE TO AQUEOUS OUTFLOW
change in structure, function or number of trabecular endothelial cells could be related to
POAG
TM lies between
scleral spur and scwalbes line
circular tube lined by endothelium
schlemms canal
last tissue the aqueous must traverse before entering the canal
the inner wall of the endothelium of sclemms canal
- bumpy
- involved with transcellular transport of aqueous
aqueous travels from the schlemms canal to episcleral venous circulation via
collector channels
demarcates termination of descements membrane
schwalbes line
most anterior structure of ACA
schwalbes line
pigmented SL
sampolesis line
anteriorly displaced and severely hypertrophic SL
posterior embryotoxon
the ACA is usually not seen without gonio because
critical angle is exceeded (46.5%) so light is reflected back into the eye
iridocorneal adhesion causing tent like distortion of iris contour
peripheral anterior synechia
iris processes arise from iris and insert into —. Shouldnt be confused with synechia because
in sert into TM
they dont distort the normal iris contour
Corneal wedge aids in locating
scwalbes line in difficult to asses angles
grade 2 Van herick is ___ closure
possible
grade 1 van herick is ___ closure
probable
pupil block can cause
convex iris with shallow angle
blood in the anterior chamber, common presentation after blunt trauma
hyphema
Avoid gonio after ___ onset of hyphema
4 weeks after onset
can cause to rebleed if rough handling
tear between longitudinal and circular muscles of the ciliary muscle associated with delayed onset 2nd open angle glaucoma
angle recession diagnosed as an abnormal broad ciliary body band
abnormally wide CB band
angle recession
blood in the inferior angle is
not detectable without gonio
microhyphema
NVI
rubeosis iridis
preceded by hypoxic retinal disease
leads to neovascular glaucoma
conditions associated to NVI
central retinal vein (or artery) occlusion
diabetic retinopathy
ocular ischemia
uveitis
mild ___ is common following gonio
SPK , if moderate-severe it can interfere with fundus examination
advice pt they’ll experience foreign body sensation
gonio lens and tonometers are ____ items and require high level disinfection
semicritical because of contact with mucous membranes or non intact skin
