This quiz titled 'Ocular Physiology - Cornea: Midterm 1' evaluates knowledge on corneal structure and function, including epithelial cell damage, corneal endothelium, and cellular junctions, essential for students in ophthalmology and medical sciences.
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The cornea is the major refractive element of the eye (+48D)
Corneal curvature and axial length determine power of the eye Corneal curvature and axial length determine power of the eye Corneal curvature and axial length determine power of the eye
Cataract surgery was the first type of refractive surgery
Damage to the corneal endothelium during RK is a minor problem
In the lasik procedure the epithelial layer is also removed completely similarly to PRK
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Keratocytes
Mitochondrial reflection
Epithelium - and Bowman's interface
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Basal cells undergo mitosis to produce wing cells
In wing cells we see internal degradation of the organelles of the cell
Superficial cells contain only cytoplasm and no debris
The epithelium of the cornea in general is very different in lifecycle and characteristic from the epithelium of the skin.
Like the epithelium of the skin, the epithelium of the cornea excretes keratin
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Stromal swelling pressure is the mechanical load/unit area required to maintain the tissue at a fixed water content
Stroma swells parallel to its surface
Collagen fibrils pull H20 into the cell
GAGS are the origin of swelling pressure
Swelling pressure is reduced over time in contact with aqueous solutions, GAGS lost to the solution
Substances that precipitates GAGS decrease swell pressure
IOP acts as external pressure
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