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Astigmatism Management

Astigmatism

Astigmatism is a common refractive error in which the cornea and the lens of the eye have an irregular curvature. For the cataract patient, eliminating corneal astigmatism results in better overall vision following cataract surgery.

A commonly used procedure to correct preexisting mild to moderate astigmatism (less than -3.0 diopter) is Limbal Relaxing Incisions (LRIs). Surgeons make a pair of incisions at the corneal limbus and induce changes in corneal astigmatism by varying the length, depth, and location of the incisions. This can be effective, but its results are less predictable than some newer and more recently available technologies.

The procedure is performed at the same time as cataract surgery and takes just a few minutes to complete. Benefits include an almost immediate recovery of vision and reduced healing time and risk associated with a secondary procedure.

Toric Lens Implants

Toric IOL

Toric Lens Implants are intraocular lenses (IOLs) designed to correct moderate to high astigmatism. Similar to other IOLs, toric lens implants are made of a soft plastic material that can be folded and inserted into a small incision during cataract surgery.

Toric IOLs serve to address astigmatism in addition to the focusing solution that a monofocal intraocular lens would provide. There are also multifocal toric intraocular lenses available. In general, vision after cataract surgery will be clearer with astigmatism corrected and these options should be discussed with your surgeon.

Laser Enhancement

Laser Enhancement Surgery is the latest tool for treating high astigmatism greater than -3.0 diopter. The procedure is commonly used in combination with Limbal Relaxing Incisions (LRIs) and/or Toric Lens Implants to help patients achieve optimal vision following cataract surgery.

Laser enhancement surgery has some distinct advantages in the treatment of corneal astigmatism for the cataract patient:

The biggest disadvantage of laser enhancement surgery is that is must be completed post-operatively, generally six weeks after cataract surgery. There is also an additional cost involved, however, for patients seeking the best possible vision following cataract surgery, the benefits often outweigh the costs.

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