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Related to astigmatic: astigmatic keratotomy
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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 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.


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


(ˌæs tɪgˈmæt ɪk)

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


[ˌæstɪgˈmætɪk] ADJastigmático


References in classic literature ?
After all, an astigmatic parent, seeing Adolf in a dim light, might be impressed by him.
Limited Tenders are invited for Spherical and astigmatic optics
He describes astigmatism in the population; the history of vectorial analysis of astigmatism; the conflict between incisional and laser ablative approaches; the origins and basics of his method; use of the nonzero target; astigmatic indices; the flattening, steepening, and rotation of astigmatism; ocular residual astigmatism; cataract patients with astigmatism; analysis and management of refractive surprises after toric intraocular lens implantation; corneal topographic astigmatism; vector planning; corneal astigmatism; mixed astigmatism; clinical application of the Alpins Method for clinical studies; performing corneal and refractive vector analysis; software used with the method; corneal coupling; and other topics.
I have been heavily myopic and astigmatic from a very young age and have had a series of wonderful optometrists over the years.
In our study, 32 patients of the 300 patients were Hypermetropic Astigmatic individuals with average corneal thickness of 532 micrometres, SD (30).
Most contact lenses correct the patient's nearsighted, farsighted or astigmatic refractive error.
Pairwise comparisons of surgically induced astigmatic changes in groups with different corneal incision lengths (mm) p1.
The rotation of the axis is the main problem for the TICL which will result in axis shift and reduced efficacy of astigmatic correction.
Females were found to be more astigmatic than males in all the powers from less than 1 to greater than 5 (p less than 0.
Star images were slightly degraded at the edge of the field; they were more out-of-focus than astigmatic, though it was hard to tell which caused the most distortion.
The firm's technology works by projecting light at an angle of 45[degrees] towards the lens that contains an embedded grating structure to redirect the light into the eye, as well as performing other optical functions such as astigmatic compensation.
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.