Mindblown: a blog about philosophy.
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Fliiidless scleral lens
A scleral lens having a relatively shallow corneal vault and not requiring the use of an auxiliary solution, since the tear fluid fills the space between the lens and the eye.
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Fitting shells, scleral
A scleral lens having a relatively deep corneal vault and requiring the use of an auxiliary solution.
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Edema, epithelial
Excess accumulation of fluid in the corneal epithelium. Excess accumulation of water in the body, particularly in the periphery; also called dropsy or hydrops. A condition of disordered water balance. It usually occurs secondary to a primary disease. In this condition, water is accumulated in the tissues distal to the kidneys. Urine volume is very…
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Dystrophies corneal
Term applied to a group of degenerative diseases of the cornea which are bilateral and slowly progressive.
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Direct illumination
A method of illumination used with the slit lamp biomicroscope, in which the slit lamp beam and the microscope are both sharply focused on the structure to be observed. The illumination of an object under a microscope by directing light rays upon its upper surface.
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Dimple veiling
A condition in which a number of bubble-like indentations appear in the surface of the cornea, due to the presence of air bubbles which have been trapped underneath the contact lens.
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Digital pressure test
A test used for evaluating the fit of a scleral lens in which finger pressure is applied to the apex of the lens.
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Diagnostic lenses
Lenses which are fitted on a patient in order to determine the lens specifications needed by the patient; diagnostic lens fit may be evaluated by the use of fluorescein and by the use of the slit lamp, and a refraction is sometimes performed while die diagnostic lens is being worn.
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Deturgescence
The state in which the corneal tissue contains less water than it is capable of holding.
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Cosmetic contact lens
A contact lens which is intended to alter the appearance of the wearer’s eye; usually used when the eye is disfigured or abnormal.
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