MediFind
Condition

Astigmatism

Symptoms, Doctors, Treatments, Research & More

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.

Visual

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

JA
Elite
Jorge L. Alio
Alicante, VC, ES
DP
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David P. Pinero
Alicante, VC, ES
HH
Elite
Hassan J. Hashemi
Tehran, 07, IR
TK
Elite
Thomas Kohnen
Frankfurt, DE

Latest Research

Latest Advance
Study
  • Condition: Ametropia in Patients with Keratoconus
  • Journal: Vestnik oftalmologii
  • Treatment Used: Intraocular Correction
  • Number of Patients: 0
  • Published —
This article discusses preoperative planning, intraoperative options, and postoperative management for the treatment of patients with keratoconus (cone-shaped cornea) requiring cataract surgery.
Latest Advance
Study
  • Condition: Intermittent exotropia
  • Journal: PloS one
  • Treatment Used: Horizontal Rectus Muscle Surgery
  • Number of Patients: 83
  • Published —
The study researched the treatment outcomes for horizontal rectus muscle surgery for patients with intermittent exotropia.

Clinical Trials

Clinical Trial
Device
  • Status: Not yet recruiting
  • Study Type: Device
  • Participants: 44
  • Start Date: December 2020
Pentacam Findings After Implantation of Intrastromal Corneal Rings in Keratoconus.
Clinical Trial
Device
  • Status: Not yet recruiting
  • Study Type: Device
  • Participants: 1000
  • Start Date: December 2020
INTACS (Intrastromal Corneal Ring Segments) For Corneal Ectasia