Astigmatism

Common Name(s)

Astigmatism

Astigmatism is a common and generally easily treatable defect of the eye that causes blurred vision. In a normal eye, light passes from an object that a person sees to the front surface (cornea) and through the inside (lens) of the eye. The curve of these parts of the eye refracts (bends) this light, creating one focused image for the back of the eye (retina). Astigmatism occurs when there is an abnormal curve of the cornea or lens, causing a poorly focused image. Astigmatism may occur in combination with nearsightedness (myopia) or farsightedness (hyperopia).

Symptoms of astigmatism may include blurred or distorted vision, eyestrain, and headaches. Astigmatism may be present at birth or it may develop after an eye injury, disease or surgery. Risk factors include a family history of astigmatism, excessive nearsightedness and farsightedness and a history of eye surgeries. Your eye doctor, either an optometrist or an ophthalmologist, can diagnose astigmatism through a comprehensive eye exam that evaluates your vision, curvature of your cornea and your ability to refract (bend) light properly.

Treatment of astigmatism may include eyeglasses, contact lenses or surgery. Talk with your doctor if you or someone you know has been diagnosed with astigmatism to learn more about treatment options.

Source: Advocacy organizations associated with the condition.

 

Advocacy and Support Organizations

 

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Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Astigmatism" for support, advocacy or research.

There are currently no organizations listed in Disease InfoSearch that support this condition. Create a listing.

 

 

General Support Organizations

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Scientific Literature

Articles from the PubMed Database

Research articles describe the outcome of a single study. They are the published results of original research.
The terms "Astigmatism" returned 209 free, full-text research articles on human participants. First 3 results:

Visual outcomes after balanced salt solution infiltration during lenticule separation in small-incision lenticule extraction for myopic astigmatism.
 

Author(s): Ting Liu, Xiaomin Zhu, Kaijian Chen, Ji Bai

Journal: Medicine (Baltimore). 2017 Jul;96(30):e7409.

 

To evaluate the refractive outcomes of balanced salt solution infiltration during small-incision lenticule extraction (SMILE).This randomized prospective study enrolled 52 patients (104 eyes) with myopic astigmatism. Patients underwent SMILE to correct the myopic astigmatism in Daping ...

Last Updated: 26 Jul 2017

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Evaluation of biometry and corneal astigmatism in cataract surgery patients from Central China.
 

Author(s): Ji-Guo Yu, Jie Zhong, Zhong-Ming Mei, Fang Zhao, Na Tao, Yi Xiang

Journal:

 

To evaluate the distribution of biometric parameters and corneal astigmatism using the IOLMaster device before phacoemulsification in cataract patients in Central China.

Last Updated: 27 Apr 2017

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Calculations of actual corneal astigmatism using total corneal refractive power before and after myopic keratorefractive surgery.
 

Author(s): Kyoung Yul Seo, Hun Yang, Wook Kyum Kim, Sang Min Nam

Journal:

 

To calculate actual corneal astigmatism using the total corneal refractive astigmatism for the 4-mm apex zone of the Pentacam (TCRP4astig) and keratometric astigmatism (Kastig) before and after photorefractive keratectomy or laser in situ keratomileusis.

Last Updated: 13 Apr 2017

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Reviews from the PubMed Database

Review articles summarize what is currently known about a disease. They discuss research previously published by others.
The terms "Astigmatism" returned 13 free, full-text review articles on human participants. First 3 results:

Toric Intraocular Lenses in the Correction of Astigmatism During Cataract Surgery: A Systematic Review and Meta-analysis.
 

Author(s): Line Kessel, Jens Andresen, Britta Tendal, Ditte Erngaard, Per Flesner, Jesper Hjortdal

Journal: Ophthalmology. 2016 Feb;123(2):275-86.

 

We performed a systematic review and meta-analysis to evaluate the benefit and harms associated with implantation of toric intraocular lenses (IOLs) during cataract surgery. Outcomes were postoperative uncorrected distance visual acuity (UCDVA) and distance spectacle independence. ...

Last Updated: 24 Jan 2016

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Objective evaluation of refractive data and astigmatism: quantification and analysis.
 

Author(s): S B Kaye

Journal: Eye (Lond). 2014 Feb;28(2):154-61.

 

The aim of this study was to present methods to improve the analysis of refractive data. A comparison of methods is used to analyse refractive powers using individual powers and aggregate data. Equations are also developed for the representation of the average power of a lens or refractive ...

Last Updated: 13 Feb 2014

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Visual acuity improvements after implantation of toric intraocular lenses in cataract patients with astigmatism: a systematic review.
 

Author(s): Blaise Agresta, Michael C Knorz, Christina Donatti, Daniel Jackson

Journal:

 

Cataracts are a common and significant cause of visual impairment globally. We aimed to evaluate uncorrected distance visual acuity (UDVA) as an outcome in treating astigmatic cataract patients to assist clinicians or ophthalmologists in their decision making process regarding available ...

Last Updated: 26 Oct 2012

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Clinical Trial Information This information is provided by ClinicalTrials.gov

Last Updated: 28 Oct 2016

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Prevalence of Corneal Astigmatism Before Glaucoma Surgery in Chinese Patients With Primary Angle-closure Glaucoma
 

Status: Recruiting

Condition Summary: Glaucoma, Angle-Closure; Astigmatism

 

Last Updated: 24 Aug 2017

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