iris napier Flashcards
(41 cards)
The long ciliary nerve branches of the trigeminal are _____ and innervate the _____ muscle
A) parasympathetic, dilator
B) parasympathetic, sphincter
C) sympathetic, dilator
D) sympathetic, sphincter
C) sympathetic, dilator (long/sympathetic/dilator, think LSD)
The short ciliary nerves from the ciliary ganglion of the Edinger-Westphal are _____ and innervate the ____ muscle
A) parasympathetic, dilator
B) parasympathetic, sphincter
C) sympathetic, dilator
D) sympathetic, sphincter
B) parasympathetic, sphincter (short/parasympathetic/sphincter, think SPS)
Which is closer to the pupil, the sphincter muscle or the dilator muscle?
the sphincter muscle
neovascularization of the iris can lead to neovascularization of the_____ which can lead to _______ ______
angle, neovascular glaucoma
(T or F) neovascular glaucoma clogs Schlemms canal and is harder to control than angle closure glaucoma
true
define ischemia
A) oxygen deprivation
B) restriction of blood flow
C) vascular dilation
D) tumor necrosis
B) restriction of blood flow
define hypoxia
A) oxygen deprivation
B) restriction of blood flow
C) vascular dilation
D) tumor necrosis
A) oxygen deprivation
8% of all uveal melanomas are found in the:
A) choroid
B) ciliary body
C) sclera
D) iris
D) iris. Iris melanoma is the most rare
iris melanoma is composed of ______ ____
spindle cells
The uvea is comprised of the parts. Which of the following is not part of the uvea?
A) choroid
B) ciliary body
C) sclera
D) iris
C) sclera
An iris nevus is a benign neoplasm composed of ______.
melanocytes (be sure to monitor for growth over time to rule out iris melanoma)
why do you not find a nevus in the cornea?
The cornea is non-pigmented and a nevus is made of melanoctes.
(T or F) iris melanoma in 3 times more common in darker pigmented irises
false, it is 3 times more common in light eyes
iris melanoma ______ ciliary body/choroidal melanoma
A) occurs around the same time as
B) is another name for
C) occurs 1 decade earlier than
D) occurs shortly after
C) occurs 1 decade earlier than
Iris melanoma is at least ____mm in diameter and ____mm thick
3mm, 1mm (which is usually much bigger than a nevus) (also usually found in inferior portion of the iris)
what diagnostic testing method is appropriate in diagnosing iris melanoma?
b-scan ultrasound
The following is a description of which condition? Patient presents with cafe au lait spots and pigmented nodules on skin, lisch nodules on iris, retinal astrocytoma, affected first-degree relative, and optic nerve glioma.
A) albinism
B) neurofibromatosis 1
C) neurofibromatosis 2
D) nothing, all these are normal
B) neurofibromatosis 1 (more common than type 2)
The following is a description of which condition? patient presents with bilateral acoustic nerve masses OR unilateral acoustic nerve masses, an affected first-degree relative, and at least 2 of the following: neurofibroma, meningioma, schwannoma, juvenile posterior cataract
A) albinism
B) neurofibromatosis 1
C) neurofibromatosis 2
D) nothing, all these are normal
C) neurofibromatosis 2
which hereditary disorder is also called Von Recklinhausen disease?
A) albinism
B) neurofibramatosis 1
C) floppy iris
D) aniridia
B) neurofibramatosis 1
where do you find lisch nodules?
A) on the skin
B) on the skin near sweat glands only
C) on the iris
D) on the cornea
C) on the iris
What disorder is caused from a deficiency in the tyosinase enzyme?
A) Albinism
B) Neurofibromatosis 2
C) Von Recklinhausen disease
D) Coloboma
A) Albinism – these patients lack the ability to convert tyrosine to melanin
In neurofibromatosis 2, what portion of patients have cataracts?
A) 1/3
B) 1/2
C) 2/3
D) 3/4
C) 2/3
With Albinism, patients usually have:
A) a dark fundus
B) nystagmus
C) many pigmented spots on their iris
D) an iris nevus
B) nystagmus (not A,C, and D…duh! they have no pigment!)
What is the term for an iris that has a lack of closure in utero (also occurs in lens, fundus, and optic nerve)?
A) coloboma
B) aniridia
C) floppy iris
D) heterochromia
A) coloboma
