LRI

LIMBAL RELAXING INCISIONS (LRI)

Many patients who suffer from a cataract also have to deal with an astigmatism. The astigmatism prevents the patient from having clear vision after the cataract has been removed from the eye.

Astigmatism means that the cornea does not have the proper shape, namely it is not spherical. When one has astigmatism, it may be thought of as the cornea being shaped more like a football rather than like a basketball. When astigmatism is present, the cornea is steeper in one meridian than in the meridian that is 90 degrees away. This improperly shaped cornea results in the inability of the cornea to optimally focuss an image onto the retina and it results in blurred or distorted image.

Having LRI performed while the cataract is being removed can help decrease or eliminate the astigmatism and thus lead to better vision after cataract surgery. Small incisions are made on the corneal limbus using a diamond blade. The doctor will make the incision depending on the results of the corneal topographer. After the incisions have been made the shape of the cornea will be altered and help cure the blurred vision secondary to the astigmatism.

Advantages of LRI:

• Astigmatism decreased or eliminated
• Better distance vision without glasses
• Minimal Cost
• Easily Combined with other vision procedures

Disadvantages of LRI:

• Not very effective for high degrees of astigmatism
• Not covered by insurance
• Reading glasses still needed

The above information is provided by Thomas John Vision Institute, P.C., and is not intended to replace the medical service and advice of Dr. John. Kindly consult your health care provider for advice regarding a special medical/ocular condition.

Last Revised/Updated on April 25, 2009.