Mindblown: a blog about philosophy.
-
Base curve
Back surface curve of a contact lens. If the back surface contains more than one curve, the base curve is that curve which corresponds to the optical zone of the lens.
-
Axial ametropia
Ametropia due primarily to variations in the anterior-posterior axis of the globe.
-
Apical touch
A condition in which a contact lens bears upon the apical portion of the cornea.
-
Apical clearance
A condition in which a contact lens clears the apical portion of the cornea, bearing on the more peripheral portions of the cornea or (in the case of a scleral lens) on the sclera.
-
Amplitude of accommodation
The difference expressed in diopters between the farthest point and the nearest point of accommodation with respect to the spectacle plane, the entrance pupil, or some other reference point of the eye. The difference in the refractive power of the eye when accommodation for near and far vision. It is measured in diopters (D) and…
-
Alternating vision bifocal
A bifocal contact lens designed so that the wearer sees alternately through one area of the lens for distance vision and through another area for near vision.
-
Adaptive
Symptoms which occur normally while a patient is becoming adapted to contact lenses; includes photophobia, lacrimation. increased blink rate, a foreign body sensation, etc.
-
Trade name
Name used by a company to describe a product or service. The name given to a drug by the pharmaceutical company which is protected by a trademark and used by the company for marketing the drug. The appellation conferred upon a medicinal substance by its fabricator, which is typically employed by the healthcare sector to…
-
Tar
Brown, sticky mass formed when tobacco smoke condenses. Complex oily mixtures derived from coal or wood (pine). Prolonged exposure to some crude tars occupationally may lead to multiple cutaneous warty lesions (pitch warts). Squamous carcinoma may supervene. More refined extracts of tar are used in dermatological therapy, especially in psoriasis. A dark, viscid mass of…
-
Side-stream smoke
Smoke that comes from a burning cigarette.
Got any book recommendations?