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Study: Reverse side cut associated with less corneal sensitivity, fewer dry eye symptoms
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CHICAGO — A comparison of a 30° side cut and 140° reverse side cut for femtosecond corneal flap creation in LASIK found that the 140° cut had improved results for corneal sensation and dry eye, according to data presented here at the joint meeting of the American Academy of Ophthalmology and Middle East African Council of Ophthalmology.
Eric D. Donnenfeld, MD, and colleagues studied the two cuts in a randomized masked trial of 35 patients with the IntraLase 150-kHz femtosecond laser (Abbott Medical Optics) using a 50° nasal hinge. All patients had a horizontal corneal flap created bilaterally. Each patient received a 30° side cut in one eye and a 140° reverse side cut in the other eye.
Dr. Donnenfeld and colleagues found that eyes with the 30? side cut were associated with more corneal staining (P = .041) and a lower tear break-up time (P = .016).
The 140° side cut was associated with "less of a reduction in corneal sensitivity and fewer dry eye symptoms," according to the authors.
- Disclosure: Dr. Donnenfeld is a consultant for Abbott Medical Optics.