Randomized, contralateral eye study to evaluate the effect of standard and inverted side‐cut angle on corneal biomechanical properties during femtosecond laser‐assisted in situ keratomileusis

Purpose To evaluate the effect of side‐cut angle profile on corneal biomechanical properties after femtosecond laser in situ keratomileusis (FS‐LASIK). Methods Ninety‐six myopic eyes of 48 patients underwent FS‐LASIK. One eye of each patient was randomized to flap creation with a side‐cut angle of 1...

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Published in:Acta ophthalmologica (Oxford, England) England), 2014-09, Vol.92 (6), p.e437-e442
Main Authors: Yip, Yolanda W. Y., Yu, Marco C. Y., Jhanji, Vishal
Format: Article
Language:English
Subjects:
Adult
Biomechanical Phenomena
Biomechanics
Cornea - physiopathology
corneal biomechanics
Corneal Stroma - surgery
Elasticity - physiology
Female
femtosecond lasik
Humans
Intraocular Pressure - physiology
Keratomileusis, Laser In Situ - methods
Lasers, Excimer - therapeutic use
Male
Middle Aged
Myopia - physiopathology
Myopia - surgery
ocular response analyser
Ophthalmology
side‐cut angle
Sports injuries
Surgical Flaps
Young Adult
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Summary:Purpose To evaluate the effect of side‐cut angle profile on corneal biomechanical properties after femtosecond laser in situ keratomileusis (FS‐LASIK). Methods Ninety‐six myopic eyes of 48 patients underwent FS‐LASIK. One eye of each patient was randomized to flap creation with a side‐cut angle of 115°. The fellow eye flap side‐cut angle was adjusted to 70°. Mean absolute error of flap diameter and mean change in Goldmann‐correlated intra‐ocular pressure (IOPg), corneal‐compensated IOP (IOPcc), corneal hysteresis (CH), corneal resistance factor (CRF), p1 area, p2 area, p1 area 1 and p2 area 1 were compared between both groups. Results Overall, the mean IOPg and CRF showed significant reduction at the end of 1 and 3 months, as well as between 1 and 3 months postoperatively (p ≤ 0.03). The mean IOPcc and CH showed significant reduction (p 
ISSN:1755-375X
1755-3768
DOI:10.1111/aos.12396