Category: M

A four-carbon intermediate in the citric acid cycle.  

Magnesium salt, antacid, laxative. Can also be used as an anticonvulsant. Salt of magnesium used orally to treat constipation and heartburn and parenterally to prevent seizures, especially in preeclampsia. Also used in the treatment of cardiac arrythmias and in myocardial infarction. A magnesium salt given in mixtures or enemas to treat constipation. It is also…

A scleral contact lens which is fitted by the process of taking an impression of the eye and making a mold.  

An instrument used for measuring the radii of curvature of a contact lens.  

In its original form, a plastic corneal contact lens of unicurve construction averaging about 9.5 mm. in diameter and fitted somewhat flatter than the optic cap of the cornea.  

A plastic material which is in general use in the fabrication of contact lenses. A polymer, made from methacrylic acid, used as a bone cement, bonding agent, drug-delivery vehicle, and tissue adhesive. Its operative use is sometimes associated with hypotension, fat or air embolism, or other complications.  

Methods used in connection with the slit lamp biomicroscope for illuminating and viewing various ocular structures.  

A magnifier having a scale calibrated in 0.1 mm. steps. which can be used for measuring widths of optical zones, bevels, secondary curves, and overall diameters of contact lenses.  

The ratio between the size of the retinal image of an ametropic eye before and after correction.  

The ratio of the size of the retinal image in a corrected amctropic eye to that in the posterior focal plane of the same eye uncorrected.