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Xerophthalmia (from Ancient Greek xērós (ξηρός) meaning "dry" and ophthalmos (οφθαλμός) meaning "eye") is a medical condition in which the eye fails to produce tears. It may be caused by vitamin A deficiency, [1] which is sometimes used to describe that condition, although there may be other causes.
Types include esotropia, where the eyes are crossed ("cross eyed"); exotropia, where the eyes diverge ("lazy eyed" or "wall eyed"); and hypertropia or hypotropia where they are vertically misaligned. [3] They can also be classified by whether the problem is present in all directions a person looks (comitant) or varies by direction (incomitant). [3]
Accommodative esotropia (also called refractive esotropia) is an inward turning of the eyes due to efforts of accommodation. It is often seen in patients with moderate amounts of hyperopia . The person with hyperopia, in an attempt to "accommodate" or focus the eyes, converges the eyes as well, as convergence is associated with activation of ...
of or pertaining to the eye's pupil: Greek κόρη (kórē), girl, doll; pupil of the eye corectomy: cord(i)-of or pertaining to the heart (uncommon as a prefix) Latin cor, heart commotio cordis, cornu-applied to describing processes and parts of the body as likened or similar to horns Latin cornū, horn greater cornu: coron-pertaining to the ...
The cross-cover test, or alternating cover test is usually employed to detect heterophoria. One eye is covered, and then the cover is moved immediately over to the other eye. With heterophoria, when the cover is moved to the other eye, the eye that has just been uncovered can be seen to move from a deviated point.
Dentistry – also known as Dental and Oral Medicine, is a branch of medicine that consists of the study, diagnosis, prevention, and treatment of diseases, disorders, and conditions of the oral cavity, commonly in the dentition but also the oral mucosa, and of adjacent and related structures and tissues, particularly in the maxillofacial (jaw ...
A page from Robert James's A Medicinal Dictionary; London, 1743-45 An illustration from Appleton's Medical Dictionary; edited by S. E. Jelliffe (1916). The earliest known glossaries of medical terms were discovered on Egyptian papyrus authored around 1600 B.C. [1] Other precursors to modern medical dictionaries include lists of terms compiled from the Hippocratic Corpus in the first century AD.
System: Eye and visual system: Significant diseases: Cataract, retinal disease (including diabetic retinopathy and other types of retinopathy), glaucoma, corneal disease, eyelid and orbital disorders, uveitis, strabismus and disorders of the ocular muscles, ocular neoplasms (malignancies, or cancers, and benign eye tumors), neuro-ophthalmologic disorders (including disorders of the optic nerve)