April 29, 2014

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Moran Eye Study Shows Promise for Women With Vision Disorder

Press Release

April 29, 2014

Salt Lake City — Three neuro-ophthalmologists at the University of Utah’s John A. Moran Eye Center participated in a recent NIH-funded study that revealed the use of an inexpensive glaucoma drug (acetazolamide), when added to a weight reduction plan, can improve and even restore vision for women with a disorder called idiopathic intracranial hypertension (IIH). The discovery as published last week in the Journal of the American Medical Association.

Moran neuro-ophthalmologists, Kathleen Digre, Judith Warner and Brad Katz were principal investigators for this study, titled “Effect of Acetazolamide on Visual Function in Patients with Idiopathic Intracranial Hypertension and Mild Visual Loss: The Idiopathic Intracranial Hypertension Treatment Trial.” Also called pseudotumor cerebri, IIH predominately affects overweight women of reproductive age. An estimated 100,000 Americans suffer from IIH. Symptoms include headaches, blind spots, double vision and temporary episodes of blindness.

IIH is named for an increased pressure within the fluid-filled spaces inside and around the brain. This in turn can cause swelling and damage to the optic nerves that connect the eyes to the brain. In severe cases, surgical procedures may be used to relieve pressure on the optic nerve.

“Having met individually and in group meetings with hundreds of women suffering from IIH for more than 20 years, I can’t begin to describe the suffering this discovery will relieve,” said Julia Kleinschmidt,  Moran emeritus professor and founder of the patient support program at Moran.

Lisa Ord, current director of the program said, “At our IIH group support meeting in October, patients shared many devastating ways this disease had affected them. This pioneering work will allow countless individuals to return to work or school, reduce their medical expenses, and carry out simple tasks of daily living that had been taken away by this disease.”

There are currently no established treatment guidelines for IIH, and approximately five to 10 percent of those affected by the disorder experience permanent vision loss. “This study will be an important resource for medical professionals who treat patients with IIH, especially as it validates the use of acetazolamide. Professionals have speculated this drug might be a viable treatment for the disorder, and now we have validated evidence of its effectiveness,” Digre said.

The trial involved 161 women and four men with IIH and mild vision loss, who were enrolled at 38 sites. All participants were put on a weight loss plan to trim salt and about 500 to 1,000 calories from their food intake each day. About half the participants were randomly assigned to receive acetazolamide. Participants on acetazolamide improved by about twice as much as those on placebo. The trial will follow participants for five years to gauge whether they’re able to maintain a healthy weight and control their symptoms over the long term.

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