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Small-incision lenticule extraction safely corrects spherical myopia
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BOSTON — Small-incision lenticule extraction safely and predictably corrected vision in patients with spherical myopia, according to a study here.
At the American Society of Cataract and Refractive Surgery annual meeting, John F. Doane, MD, elucidated preliminary clinical trial results with the ReLEx femtosecond laser-assisted small-incision lenticule extraction (smile) procedure with the VisuMax femtosecond laser (Carl Zeiss Meditec).
“It’s incredibly predictable,” Doane said.
The trial included 315 eyes. Mean preoperative manifest refraction spherical equivalent (MRSE) was –4.66 D and mean sphere was –4.56 D. Mean cylinder was –0.19 D.
Mean postoperative MRSE was –0.14 D at 7 days, –0.15 D at 1 month, 3 months and 6 months, –0.09 D at 9 months and –0.06 D at 12 months.
Refractive predictability was high. “We think that’s because we’re doing surgery inside the cornea, so it’s essentially inside a vacuum. You don’t have to worry about the environmental parameters like temperature and humidity and so forth,” Doane said.
Uncorrected visual acuity was 20/20 or better in 93% of eyes at 9 months and 94% of eyes at 12 months.
MRSE was within 0.5 D of the target in 96% of eyes at 12 months.
Intraoperative events included loss of suction and difficult lenticule removal without tissue loss. Adverse events included difficult lenticule removal with tissue damage, perforated cap, retained tissue, viral conjunctivitis and foreign body sensation. A majority of eyes had neither intraoperative nor adverse events.
Disclosure: Doane is a consultant for Carl Zeiss Meditec.