MediFind
Condition

Astigmatism

Condition 101

What is the definition of Astigmatism?

Astigmatism is a type of refractive error of the eye. Refractive errors cause blurred vision. They are the most common reason why a person goes to see an eye professional.

Other types of refractive errors are:

  • Farsightedness
  • Nearsightedness

What are the causes for Astigmatism?

People are able to see because the front part of the eye (cornea) is able to bend (refract) light and focus it onto the retina. This is the back inside surface of the eye.

If the light rays are not clearly focused on the retina, the images you see may be blurry.

With astigmatism, the cornea is abnormally curved. This curve causes vision to be out of focus.

The cause of astigmatism is unknown. It is most often present from birth. Astigmatism often occurs together with nearsightedness or farsightedness. If astigmatism gets worse, it may be a sign of keratoconus.

Astigmatism is very common. It sometimes occurs after certain types of eye surgery, such as cataract surgery.

What are the symptoms for Astigmatism?

Astigmatism makes it hard to see fine details, either close up or from a distance.

What are the current treatments for Astigmatism?

Mild astigmatism may not need to be corrected.

Glasses or contact lenses will correct astigmatism, but do not cure it.

Laser surgery can help change the shape of the cornea surface to eliminate astigmatism, along with nearsightedness or farsightedness.

What is the outlook (prognosis) for Astigmatism?

Astigmatism may change with time, requiring new glasses or contact lenses. Laser vision correction can most often eliminate, or greatly reduce astigmatism.

What are the possible complications for Astigmatism?

In children, uncorrected astigmatism in only one eye may cause amblyopia.

When should I contact a medical professional for Astigmatism?

Call your health care provider or ophthalmologist if vision problems worsen, or do not improve with glasses or contact lenses.

REFERENCES

Jain S, Tibrewal, Kramarevsky N, Hardten DR. Excimer laser photorefractive keratectomy. In: Yanoff M, Duker JS, eds. Ophthalmology. 4th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 3.3.

Olitsky SE, Hug D, Plummer LS, Stahl ED, Ariss MM, Lindquist TP. Abnormalities of refraction and accommodation. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 620.

White PF, Scott CA. Contact lenses. In: Yanoff M, Duker JS, eds. Ophthalmology. 4th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 2.7.

Top Global Doctors

Latest Research

Latest Advance
Study
  • Condition: Ectopia Lentis
  • Journal: Nepalese journal of ophthalmology : a biannual peer-reviewed academic journal of the Nepal Ophthalmic Society : NEPJOPH
  • Treatment Used: Scleral Fixated Intraocular Lens Implantation
  • Number of Patients: 15
  • Published —
In this study, researchers evaluated the outcomes of undergoing scleral fixated intraocular lens implantation for the treatment of ectopia lentis in children.
Latest Advance
Study
  • Condition: Unilateral Coronal Synostosis (UCS) in Young Children
  • Journal: BMC ophthalmology
  • Treatment Used: Surgery
  • Number of Patients: 30
  • Published —
This study reported outcomes of surgical treatment for pediatric unilateral coronal synostosis (early fusion of cranial sutures; UCS).
Latest Advance
Study
  • Condition: Surgically Induced Astigmatism
  • Journal: Scientific reports
  • Treatment Used: Clear Corneal Incision (CCI) in Cataract Surgery
  • Number of Patients: 0
  • Published —
This article discusses the site of clear corneal incision in cataract surgery and its effects on surgically induced astigmatism.
Latest Advance
Study
  • Condition: Very High Myopia
  • Journal: Cornea
  • Treatment Used: Small Incision Lenticule Extraction (SMILE)
  • Number of Patients: 270
  • Published —
This study assessed the stability, safety, predictability, and efficacy of small incision lenticule extraction (SMILE) in high myopia (nearsightedness).

Clinical Trials

Clinical Trial
Device
  • Status: Recruiting
  • Study Type: Device
  • Participants: 124
  • Start Date: July 21, 2020
Post-Approval Study of the Visian Toric Implantable Collamer Lens
Clinical Trial
Diagnostic Test
  • Status: Recruiting
  • Study Type: Diagnostic Test
  • Participants: 356
  • Start Date: April 15, 2020
The Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism Using Scheimpflug Analyzer (Pentacam ) in a Sample of Egyptian Population
Clinical Trial
Device
  • Status: Recruiting
  • Study Type: Device
  • Participants: 333
  • Start Date: January 30, 2020
A Multicenter Clinical Evaluation of the EVO/EVO+ Visian® Implantable Collamer® Lens