Sclera and Uvea Flashcards
Three components of the uveal tract
Iris, Choroid, Ciliary Body
Granulomatous vs Nongranulomatous Uveitis
non-Granulomatous: acute onset, marked pain and photophobia, moderate blurred vision, marked circumcorneal flush, small white keratic ppts, small and irreg pupils, sometimes post. synechiae, no iris nodules, anterior site, acute course, common recurrence
granulomatous: insidious onset, no or minimal pain, slight photophobia, marked blurred vision, slight circumcorneal flash, large gray (“mutton fat”) keratic ppts, small and irregular (variable), sometimes post. synechiae, ant, post or panuveitis, chronic course, sometimes recurs
Two conditions classified as anterior uveitis
Iritis, iridocyclitis
Uveitis can be classified based on three (3) categories. Enumerate and provide the subcategories.
a) Anatomical or Clinical - anterior, intermediate, posterior, diffuse
b) Pathological - granulomatous, non-granulomatous
c) Etiology - infectious, non-infectious, and malignancy
Part of the uveal tract that is responsible for aqueous production.
Ciliary body
Iris muscle that contracts in response to parasympathetic stimulation
Sphincter
Anterior extension of the ciliary body
Iris
Layers of the iris
Stroma - chromatophores; sphincter and dilator muscles
Iris Pigmented Epithelium (IPE) - anterior extension of neuroretina and RPE
Function of the iris
Regulate pupil size
Extent of the ciliary body
From ant end of choroid to the root of the iris
Part of the ciliary body involved in aqueous humor production:
a) pars plana
b) pars plicata
pars plicata
Why is backflow of the aqueous humor impossible?
Posteriorly, the solid, gel-like vitreous humor is present. Vitreous is immiscible with aqueous.
Trace the pathway of the aqueous humor.
Lens and iris to pupil to iridocorneal angle (trabecular meshwork)
T or F: Angle is only found in the periphery
True
Where does the aqueous humor drain?
trabecular meshwork