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30 Cards in this Set
- Front
- Back
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What makes up the uvea?
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Iris
Ciliary Body Choroid |
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Thin, circular structure located anterior to the lens that is similar to the optical aperture of a camera
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Iris
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Circular opening of the iris
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pupil
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Small pupil is called
when is it small? |
Miotic
In bright light |
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Large pupil is called?
When is it large? |
Mydriactic
At night |
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Thickest region of the iris, a ridge close to the pupillary margin
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Collarette
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Which zones does that collarette divide the iris into?
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Pupillary Zone
Ciliary Zone |
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When there is trauma to the head, the thin root of the iris can tear away from the ciliary body, and this creates a condition known as
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Iridodialysis
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Surface layer of the iris that is a thin condensation of the stroma
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Anterior Border Layer
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The iris arteries are branches of a circular vessel , located in the ciliary body near the iris root. What is the name of this vessel?
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Major circle of the iris
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Muscle located in the pupil zone of the stroma and made of smooth muscle cells. makes the pupil constrict.
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Spincter muscle
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What muscle makes the pupil bigger?
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Dilator muscle
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Abnormal attachment between the iris surface and another structure...
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Iris Synechiae
Posterior: iris sticks to the lens Anterior: iris sticks to trabecular meshwork |
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Thick, radially oriented, branching trabeculae encircle depressions or openings in the surface are called
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Crypts
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Area of hyperpigmentation, an accumulation of melanocytes, and is often seen in the anterior border layer
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Nevus
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CC: Pigment is shred from the posterior iris surface and is dispersed into the anterior chamber
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Pigment Dispersion Syndrome
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One iris differs in color from the other
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Heterochromia
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The termination of the ciliary body is called the
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Ora Serrata
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The two parts of the ciliary body
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Pars plicata: wider
Pars plana: flatter regions |
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Ora serrata has a dentate pattern, and the apices are called
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Dentate processes
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What courses from the ciliary body to the lens?
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Zonule fibers
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Which types of fibers made up the ciliary muscle/body?
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Longitutional muscle fibers
Radial fibers Muller's annular muscle |
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Pigmented ciliary epithelium is continuous with
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retinal pigment epithelium and the anterior iris epithelium
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Non pigmented ciliary epithelium is continous with
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posterior iris epithelium and neural retina
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Outermost layer of the choroid that is made up of larger diameter blood vessels
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Haller's layer
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Layer in choroid made of medium diameter blood vessels
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Sattler's layer
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Ability of the eye to change power and bring near objects into focus is called
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accommodation
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Normal age related change that results in the loss of the ability to accommodate
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Presbyopia
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With aging, excessive basement membrane material is deposited in the collagenous zones Bruch's membrane
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Drusen
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Degenerative processes involving the choroid-retina interface in the macular area often are manifested as
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Age related macular degeneration
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