Examlex
Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.
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Blepharitis
An inflammation of the eyelid edges, often causing redness, itching, and dandruff-like scales on the eyelashes.
Aphakia
The absence of the lens of the eye, often resulting in reduced vision or blindness, treatable with lenses or surgery.
Hemianopia
A vision disorder characterized by a loss of vision or blindness in half the visual field, usually resulting from damage to the brain or optic pathways.
Macula Lutea
A small, yellowish central area of the retina that is rich in cones and where visual acuity is highest.
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