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astigmatism
astigmatism
astigmatism A lens defect in which rays in one plane are in focus when those in another plane are not. The eye can suffer from astigmatism, usually when the cornea is not spherical. It is corrected by using an anastigmatic lens, which has different radii of curvature in the vertical and horizontal planes.
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Postoperative Astigmatism after Intracapsular Cataract Surgery: Results of a Randomised Controlled Trial in Nepal.(Original Article)
Magazine article from: Indian Journal of Ophthalmology; 1/1/2001; ; 700+ words
; ...complications of cataract surgery is induced astigmatism.[6] It has been found that excessive postoperative astigmatism remains a significant problem delaying...investigate the occurrence of postoperative astigmatism. Materials and Methods Participants...
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FDA OKs CustomVue for mixed astigmatism
Magazine article from: Ophthalmology Times; 5/1/2005; ; 700+ words
; ...CustomVue, VISX/AMO) for treating mixed astigmatism on March 22. This approval allows for...treatment of myopia, hyperopia, and mixed astigmatism, according to the company. Stephen...principal investigator in the mixed astigmatism trial as well as the previous trials...
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FOR THOSE DIAGNOSED WITH AN ASTIGMATISM, THERE'S GOOD NEWS FROM BAUSCH & LOMB
PR Newswire; 5/6/1992; 700+ words
; FOR THOSE DIAGNOSED WITH AN ASTIGMATISM, THERE'S GOOD NEWS FROM BAUSCH...of Americans diagnosed with an astigmatism who've been told for years that...for just about all those with an astigmatism to be fit with soft contact lenses...
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PRK more accurate when astigmatism isn't also a factor
Magazine article from: Ophthalmology Times; 3/1/1999; ; 700+ words
; ...MELBOURNE, AUSTRALIA-A new method of astigmatism analysis that uses both corneal and...data has shown that PRK to treat myopic astigmatism with the VISX 20/20 excimer laser...in treatment was that the programmed astigmatism treatment in the laser undercorrected...
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Suture and surgically induced astigmatism after cataract surgery.(Letter to the editor)
Magazine article from: Indian Journal of Ophthalmology; 1/1/2004; ; 616 words
; ...comments on her article on keratometric astigmatism after ECCE.[2] I would like to clarify...ATR) or with-the-rule (WTR) astigmatism on either side of the vertical (90...by Dr. Sood. Beyond this is oblique astigmatism.[3] With the greater understanding...
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Selective suture cutting for control of astigmatism following cataract surgery.(Original Article)
Magazine article from: Indian Journal of Ophthalmology; 5/1/1992; ; 700+ words
; ...surgery leads to high with the rule astigmatism. Many intraoperative and post operative...been used to minimise post operative astigmatism. We did selective suture cutting in 38 consecutive patients. Mean keratometric astigmatism at three and six weeks post operative...
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Excimer laser helps correct residual astigmatism
Magazine article from: Ophthalmology Times; 11/1/2002; ; 700+ words
; ...Predictable results Patients with residual astigmatism after IOL implantation can be successfully...in patients with 2 D or more of astigmatism. The outcomes differed for patients with against-the-rule astigmatism compared with those who had with...
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Effect of pterygium excision on pterygium induced astigmatism.(Disease/Disorder overview)
Magazine article from: Indian Journal of Ophthalmology; 4/1/2003; ; 700+ words
; ...Pterygium is known to affect refractive astigmatism, which can have a significant impact...of pterygium excision on refractive astigmatism. Thirty-six eyes with primary pterygium with astigmatism of 2D or more were analysed before and...
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Role of suturing and incision in astigmatism following cataract surgery.(Articles)
Magazine article from: Indian Journal of Ophthalmology; 11/1/1984; ; 700+ words
; ...that in cataract surgery there would be astigmatism produced due to healing of section...suturing techniques, degree and type of astigmatism has varied. MATERIAL AND METHODS A...produced slightly less amount of average astigmatism. Whereas in group III where improper...
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Arcitome a useful tool for treating high astigmatism
Magazine article from: Ophthalmology Times; 11/15/2000; ; 700+ words
; ...naturally occurring or surgically induced astigmatism, especially after penetrating keratoplasty...is an effective procedure to correct astigmatism. It allows a large optical zone and...symmetric incisions are based on refractive astigmatism and centered on steep corneal meridians...
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Astigmatism
Encyclopedia entry from: Gale Encyclopedia of Medicine, 3rd ed.
Astigmatism Definition Astigmatism is the result of an inability of the cornea to properly focus...cornea are called diseases of refraction or refractive disorders. Astigmatism is an image distortion that results from an improperly shaped...
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astigmatism
Book article from: A Dictionary of Biology
astigmatism A lens defect in which rays in one plane are in focus when those in another plane are not. The eye can suffer from astigmatism, usually when the cornea is not spherical. It is corrected by using an anastigmatic lens, which has different...
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contact lenses
Book article from: The Oxford Companion to the Body
...Interestingly, this showed that his astigmatism was not due to his cornea, which is...may not adequately correct any corneal astigmatism. The most recent new soft contact lens...be used for hypermetropia and corneal astigmatism. Any astigmatism not corrected by the...
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Laser In-Situ Keratomileusis (LASIK)
Encyclopedia entry from: Gale Encyclopedia of Surgery: A Guide for Patients and Caregivers
...ophthalmologists to correct myopia, hyperopia, or astigmatism. The surgeon uses an excimer laser...hyperopia (farsightedness), or astigmatism without eyeglasses, contact lenses...steepens the cornea. Surgeons correct astigmatism by creating a normally shaped cornea...
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Vision Disorders
Book article from: U*X*L Complete Health Resource
...pee-a) or nearsightedness; and astigmatism, which causes the eye to form a blurred...blurred images. This condition is called astigmatism. Vision Disorders: Words to Know Accommodation...waves from distant or near objects. Astigmatism: A condition in which light from a...
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