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

 

Condition Specific 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 213 free, full-text research articles on human participants. First 3 results:

Neck/shoulder discomfort due to visually demanding experimental near work is influenced by previous neck pain, task duration, astigmatism, internal eye discomfort and accommodation.
 

Author(s): Camilla Zetterberg, Mikael Forsman, Hans O Richter

Journal:

 

Visually demanding near work can cause eye discomfort, and eye and neck/shoulder discomfort during, e.g., computer work are associated. To investigate direct effects of experimental near work on eye and neck/shoulder discomfort, 33 individuals with chronic neck pain and 33 healthy ...

Last Updated: 23 Aug 2017

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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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Correlation between the graft-host junction of penetrating keratoplasty by anterior segment-optical coherence tomography and the magnitude of postoperative astigmatism.
 

Author(s): Ghada Azab Nassar, Shaimaa Abd El Salam Arfeen

Journal: Indian J Ophthalmol. 2017 Jul;65(7):574-578.

 

This study aimed to evaluate the alignment pattern of the graft-host junction after penetrating keratoplasty (PK) by anterior segment-optical coherence tomography (AS-OCT) and to correlate this pattern with the magnitude of postoperative astigmatism.

Last Updated: 20 Jul 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

Accuracy of Corneal Astigmatism in Different Region Modes
 

Status: Not yet recruiting

Condition Summary: Astigmatism; Cornea

 

Last Updated: 27 Sep 2017

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Manually Performed Limbal Relaxing Incisions vs Femtosecond Laser-guided Astigmatic Keratotomy
 

Status: Not yet recruiting

Condition Summary: Corneal Astigmatism

 

Last Updated: 25 Aug 2017

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Influence of Trabeculectomy and Phaco-trabeculectomy on Corneal Astigmatism
 

Status: Not yet recruiting

Condition Summary: Astigmatism; Glaucoma

 

Last Updated: 26 Oct 2016

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