Structures of the eye and adnexa (cornea, lens, retina, optic nerve, eyelid) with their function, tested on the NBEO.
45 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the function of the corneal epithelium?
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Acts as a barrier against infection and forms a smooth optical surface with the tear film- Which corneal layer lies directly beneath the epithelium?
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Bowman's layer- What is the thickest layer of the cornea?
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The stroma- What is Descemet's membrane?
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The basement membrane of the corneal endothelium- What is the function of the corneal endothelium?
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It pumps fluid out of the stroma to keep the cornea deturgesced and clear- Is the cornea vascularized?
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No, the cornea is avascular- Which cranial nerve provides corneal sensation?
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Cranial nerve V1, the ophthalmic branch of the trigeminal nerve- What is the approximate refractive power of the cornea?
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About 43 to 44 diopters- The cornea and lens together provide about ____ diopters of total refractive power to the eye.
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58-60- What structure connects the lens to the ciliary body?
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Zonular fibers (zonules of Zinn)- What happens to the lens shape during accommodation?
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It becomes more rounded, increasing its curvature to focus on near objects- Does the lens have a direct blood supply?
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No, the lens is avascular- What is the lens capsule?
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An elastic membrane that encloses the entire lens- Where is the only epithelial cell layer of the lens located?
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Beneath the anterior capsule- What is presbyopia?
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Age-related loss of accommodation caused by lens stiffening
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