This study is designed to compare the effectiveness of LenSx laser arcuate relaxing incisions vs. manual (blade) arcuate relaxing incisions in patients with low, but significant, levels of astigmatism.
This study is a comparative, prospective, randomized contralateral eye study of visual outcomes after LenSx laser arcuate relaxing incisions utilizing the Woodcock nomogram at 90% thickness vs. manual (blade) fixed keratome diamond knife at 600 microns for arcuate relaxing incisions utilizing the Donnenfeld nomogram. Subjects will be assessed pre-operatively and at 1 day, 1 month and 3 months post-operatively. Clinical evaluations will include measurement of visual acuity, manifest refraction and corneal astigmatism measurement with the Lenstar and slit lamp exam.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
41
Corneal arcuate incision made either with a blade (manual) or femtosecond laser system.
Manual LRI
Gainesville Eye Associates
Gainesville, Georgia, United States
Residual Refractive Astigmatism
Residual refractive astigmatism measured in diopters
Time frame: 3 months
Eyes With Residual Refractive Astigmatism < 0.50 Diopters (D)
The number of eyes with residual refractive astigmatism \< 0.50 diopters (D)
Time frame: 3 months
Uncorrected Monocular Distance Visual Acuity
Uncorrected monocular distance visual acuity in logMAR
Time frame: 3 months
Spherical Equivalent Refraction
Spherical equivalent refraction in diopters
Time frame: 3 months
Corneal Astigmatism
Anterior corneal astigmatism
Time frame: 3 months
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