by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Dry Eye A condition that occurs when the tear gland (See lacrimal gland this section) produces less tears creating a dry eye surface. (For more information, please see
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Pupil The opening created by the iris through which light passes on to the retina. Unlike what is generally believed, this structure only regulates the amount of light entering the eye and does not actually “focus,” although depth of field is affected by...
by daniel | Nov 16, 2016 | Glasses Terminology
Vertex Distance The distance between a corrective lens and the cornea. An important measurement with moderate to high refractive errors since the final power of a glasses lens or contact lens will depend upon its distance from the retina.
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Farsightedness (Hyeropia) An optical error in which the eye sees better at a distance than near without correction. (See Refractive Disorders for more details.) Individuals may not recognize any sense of blurred vision at near depending upon their age and degree of...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Retina The inner lining of the eye containing millions of nerve cells, and is often compared to the film inside of a camera. The retina actually does not “see” but is an electrically sensitive membrane which pick up light rays entering the eye, processes...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Flashes of Light See Photopsia.
