Category: D

A recent revision of the Recommended Dietary Allowance (RDA) by the Food and Nutrition Board (National Academy of Sciences) that provides guidance in assessing the dietary intakes of selected population groups. Many of the DRI values for minerals are different from the RDAs in that ranges are provided rather than set figures. The population is…

An isotonic solution containing 50 g of glucose per liter of solution.  

Term applied to a group of degenerative diseases of the cornea which are bilateral and slowly progressive.  

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.  

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.  

A test used for evaluating the fit of a scleral lens in which finger pressure is applied to the apex of the lens.  

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.  

The state in which the corneal tissue contains less water than it is capable of holding.  

Taking a drug into your body.  

People who are both physically and psychologically dependent on drugs.