astigmatic


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Related to astigmatic: astigmatic keratotomy
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astigmatism
top: normal eye with light focusing on the retina
bottom: astigmatic eye with light focusing in different places on or in front of the retina

a·stig·ma·tism

 (ə-stĭg′mə-tĭz′əm)
n.
A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision.

[a- + Greek stigma, stigmat-, point (from stizein, stig-, to tattoo; see steig- in Indo-European roots).]

as′tig·mat′ic (ăs′tĭg-măt′ĭk) adj. & n.
as′tig·mat′i·cal·ly adv.

astigmatic

(ˌæstɪɡˈmætɪk)
adj
(Pathology) relating to or affected with astigmatism
n
(Pathology) a person who has astigmatism
[C19: from a-1 + Greek stigmat-, stigma spot, focus; see stigma]
ˌastigˈmatically adv

as•tig•mat•ic

(ˌæs tɪgˈmæt ɪk)

adj.
1. pertaining to, exhibiting, or correcting astigmatism.
2. marked by rigidity or distortion, as in judgment.
[1840–50; a-6 + stigmatic]
as`tig•mat′i•cal•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.astigmatic - of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images
anastigmatic, stigmatic - not astigmatic
Translations

astigmatic

[ˌæstɪgˈmætɪk] ADJastigmático

astigmatic

adjastigmatisch
References in classic literature ?
After all, an astigmatic parent, seeing Adolf in a dim light, might be impressed by him.
The clear, consistent insights reveal the challenges astigmatic patients experience with toric lenses, and their ongoing quest to find more satisfactory vision correction options.
This article reviews new findings on the increased uptake of soft torics, the advantages of fitting patients with the latest designs and assessment techniques to benefit still more astigmatic patients.
One example of a fixed lens panoramic camera would be to use a convex mirror for capturing light of the surrounding panorama, an astigmatic lens for correcting astigmatism, a camera objective lens for converging light to a single point, a field flattening lens for converting polar format images into two-dimensional planar images and an image capture mechanism for capturing optimised two-dimensional annular images of the surrounding panorama.
Due to their small size, astigmatic mites (Subclass Acari) are able to survive in habitats and ecological niches unavailable to larger arthropods, including a multitude of microhabitats on and in the bodies of the host animals.
After securing CE mark approval, the VICTUS platform is approved for LASIK flap, astigmatic keratotomy, INTRACOR, capsulotomy and lens fragmentation.
He added: "My health is always number one and a couple of years ago I was chronically astigmatic, which is an eyesight problem.
Scientists mostly from post-socialist countries describe their experiments or review the literature regarding such matters as paraxial light beams with angular momentum, quasi-ballistic light scattering on particulate media, a novel single-shot technique of micro-nano patterning in single-step through selective laser ablation, optical design techniques in developing current eye models, optical waves in a medium with a rotating optical indicatrix, and a geometrical-optics analogue of an astigmatic elliptic Gaussian beam.
Even if this employee wears the best astigmatic correction possible and presbyopia is setting in, the person may possibly need a near-point correction, in addition to the astigmatic prescription.
Walking down that hall, a short, fat, astigmatic clock-maker knew he was King.
Speaking of the plate, plates are almost always round, so what astigmatic individual was it who decided to call that five-sided polygon the batter stands next to a plate?
We may even have been willing to turn, if not a blind eye, an astigmatic gaze, on "stress questioning" (torture to you and me).