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A small, fleshy, ovoid structure attached to the inferomedial side of the pica semilunaris. It contains sebaceous glands and fine, colorless hairs.
It is a narrow, higly vascular, crescent-shaped fold of the conjunctiva located lateral to and partly under the caruncle. It is a vestigial structure analogous to the nictitating membrane, or third eyelid, of dogs and other animals.
The lacrimal glands are exocrine glands, and they produce a serous secretion. The body of each gland contains 2 cell types:
- Acinar cells
- Myoepithelial cells
It drains the venous system of the choroid, ciliary body, and iris.
It is the most anterior extension of the uveal tract. It is made up of blood vessels and connective tissue, in addition to the melanocytes and pigment cells that are responsible for its distinctive color.
Disinsertion of the iris root (thinnest portion of the iris) from the ciliary body, commonly caused by blunt trauma
The thickest portion of the iris
The two principal function of the ciliary body:
- Aqueous Humor Production
It is the posterior portion of the uveal tract, nourishes the outer portion of the retina
A PAS-positive lamina resulting from the fusion of the basal laminae of the retinal pigment epithelium (RPE) and the choriocapillaris of the choroid
It is a continuous layer of large capillaries lying in a single plane beneath the RPE
The lens contributes how much of the 60D focusing power of the average adult eye?
It is the boundary between the retina and the pars plana.
It is a clear matrix composed of collagen, hyaluronic acid and water, composing 80% of the volume of the eye.
It is that portion of the posterior retina containing xanthophyll (yellow) pigment
Macula Lutea or Yellow Spot
The central 1.5mm within the macula is occupied by ____________.
fovea or fovea centralis - specialized for high spatial acuity and for color vision
A 0.35 mm diameter within the fovea, where the cones are slender and densely packed
A small depression within the foveola
A ring 0.5mm in diameter surrounding the fovea where the ganglion cell layer, inner nuclear layer and outer plexiform layer are thickest
A zone approximately 1.5 mm wide surrounding the parafoveal area
Extension of pars plana onto the retinal sides
Periodic jetties of retinal tissue into the pars plana
dentate processes - more prominent on the nasal peripheral fundus
It is a radially oriented, prominent thickening of retinal tissue extending into the pars plana
Layers of the Retina (from outer to inner)
- retinal pigment epithelium (RPE)
- rods and cones - outer and inner segments
- external limiting membrane (ELM)
- outer nuclear layer
- outer plexiform layer
- inner nuclear layer
- inner plexiform layer
- ganglion cell layer
- nerve fiber layer
- internal limiting membrane (ILM)
It is a single layer of hexagonally shaped cuboidal cells of neuroectodermal origin lying between the bruch's membrane and retina