First Author: J.Venter UK
Co Author(s):
Purpose:
To report our initial experience of correction of mixed astigmatism with femtosecond-assisted astigmatic keratotomy in patients with history of refractive surgery.
Setting:
Optical Express, London, United Kingdom
Methods:
One hundred and twelve eyes with history of excimer laser surgery, refractive lens exchange/cataract surgery or phakic intraocular lens implant and a low amount of mixed astigmatism refractive error underwent Intralase-assisted astigmatic keratotomy. Outcome measures included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), subjective refraction and keratometry. Holladay-Carvy-Koch method was used to calculate the surgically induced refractive change (SIRC). Preoperative and postoperative refractive cylinder was displayed on a doubled-angle plot. Six months data are presented in this study.
Results:
The average absolute value of subjective cylinder changed from 1.20 D ± 0.47 SD (range 0.50 to 2.75 D) to 0.55 D ± 0.40 SD (range 0 to 2.25 D), p < 0.01. 72% of eyes where within 0.50 D of desired correction when comparing attempted refractive cylinder to the cylinder component of SIRC. Subjective sphere reduced from +0.61 D ± 0.33 SD (range +0.25 to +1.50 D) to +0.17 D ± 0.36 SD (range -0.75 to +1.25 D), p < 0.01. There was an average gain of 2 lines of UDVA, while there was no statistically significant difference between preoperative and postoperative CDVA.
Conclusions:
Astigmatic keratotomy performed with the IntraLase laser was effective in reducing refractive error in patients where other surgical options were exhausted. FINANCIAL DISCLOSURE?: No
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