Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.astigmia - (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
ophthalmology - the branch of medicine concerned with the eye and its diseases
ametropia - (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia
keratectasia - abnormal bulging of the cornea of the eye
keratoconus - abnormal cone-shaped protrusion of the cornea of the eye; can be treated by epikeratophakia
2.astigmia - (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
optics - the branch of physics that studies the physical properties of light
condition, status - a state at a particular time; "a condition (or state) of disrepair"; "the current status of the arms negotiations"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Again, there is a limit as to how long a person with moderate to large amounts of astigmia can concentrate on a detailed task without some avoidance and/or fatigue that can lead to an eye-tension-related headache.