Astigmatism Correction

Submitted by Thiruvelan on Fri, 06/25/2010

Persons with astigmatism have several options available to regain their original clear vision.

Astigmatism correction treatments

Astigmatism treatment options

  • Eyeglasses
  • Contact lenses
  • Orthokeratology
  • Laser and other refractive surgery procedures

Astigmatism correction Eyeglasses

Eyeglasses are the primary choice of correction for persons with astigmatism. They will contain a special cylindrical lens prescription to compensate for the astigmatism. This provides for additional lens power in only specific meridians of the lens. An example of a prescription for astigmatism for one eye would be -1.00 -1.25 X 180. The middle number (-1.25) is the lens power for correction of the astigmatism. The "X 180" designates the placement (axis) of the lens power. The first number (-1.00) indicates that this prescription also includes a correction for nearsightedness in addition to astigmatism.

Generally, a single vision lens is prescribing to provide clear vision at all distances. However, for patients over about age 40 who has the condition called presbyopia, a bifocal or progressive addition lens may need. These provide different lens powers to see clearly, in the distance, and to focus effectively for near vision work.

A wide variety of lens types and frame designs are now available for patients of all ages. Eyeglasses are no longer just a medical device that provides needed vision correction. Eyeglass frames are available in various shapes, sizes, colors, and materials, which not only allow for correction of vision, but also enhance appearance.

Astigmatism correction Contact lenses

For some individuals, contact lenses can offer better vision than eyeglasses. They may provide clearer vision and a wider field of view. However, since contact lenses are put-up directly on the eyes, they require regular cleaning and care to safeguard eye health.

Soft contact lenses conform to the shape of the eye; therefore, standard soft lenses may not be effective in correcting astigmatism. However, special toric soft contact lenses are available to provide a correction for many types of astigmatism. Because rigid gas permeable contact lenses maintain their regular shape while on the cornea, they offer an effective way to compensate for the cornea’s irregular shape and improve vision for persons with astigmatism and other refractive errors.

Orthokeratology (Ortho-K) involves the fitting of a series of rigid contact lenses to reshape the cornea, the front outer cover of the eye. The contact lenses are warning only for limit periods, such as overnight, and then removed. Persons with moderate amounts of astigmatism may temporarily obtain clear vision without lenses for most of their daily activities. Orthokeratology does not permanently improve vision and if stop wearing the retainer lenses; the vision may return to its original condition.

Astigmatism correction Laser’s surgery

Astigmatism can also correct by reshaping the cornea using a highly focused laser beam of light. Two commonly used procedures are photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK).

PRK removes tissue from the superficial and internal layers of the cornea. Astigmatism LASIK does not remove tissue from the surface of the cornea, but only from its inner layer. To do this, a section of outer corneal surface is cut and folds backward to expose the inner tissue. Then a laser is useful to remove the precise amount of tissue needed and the flap of external tissue places back in the position to heal. Both procedures allow light to focus on the retina by altering the shape of the cornea.

Individuals with astigmatism have a wide range of options to correct their vision problem. In consultation with the optometrist, one can select the treatment that best meets their visual and lifestyle needs.