Purchase this article with an account.
Sharif Hashmani, Nauman Hashmani; Visual and refractive outcomes of topography guided LASIK on virgin eyes. Invest. Ophthalmol. Vis. Sci. 2018;59(9):5747.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
We wanted to assess the efficacy, predictability and stability of topography guided LASIK (TGL) using the Allegretto Wave Eye-Q excimer laser system on normal untreated eyes with a preoperative best corrected visual acuity (BCVA) of 20/20.
This was a retrospective, non-randomized, and single arm study evaluating the outcomes of TGL in eyes with a preoperative BCVA of 20/20. We followed 50 eyes of 50 patients that presented to the Hashmanis Hospital, Pakistan for 6 months postoperatively. The following visual outcomes were recorded on day 1, week 1, and month 1, 3 and 6: Sphere, cylinder, spherical equivalent (SE), BCVA and uncorrected visual acuity (UCVA). All eyes underwent the Alcon Wavelight Allegro Topolyzer (Alcon Surgical, Inc) using software version 1.76r72.
The mean preoperative sphere, cylinder and spherical equivalent values were -4.3 ± 1.6 D, -1.0 ± 0.8 D, and -4.8 ± 1.8 D. On day one these values were 0.2 ± 0.8 D, -0.5 ± 0.3, and 0.3 ± 0.8, respectively and on month six they were -0.1 ± 0.6, -0.5 ± 0.3, and -0.36 ± 0.6 D, respectively. On postoperative day one and month six, 85% and 94% of eyes had a UCVA of 20/20 or better, respectively. Similarly, 4% and 18% of eyes had a UCVA of 20/12 or better, respectively. Our efficacy index was 1.47 and our predictability was 90%. Two eyes (4%) had a SE change of greater than 0.5 D from three to six months.
Our study demonstrates good efficacy, predictability and stability of eyes undergoing topography guided LASIK. Additionally, we demonstrate the ability of this technique to offer superior visual outcomes to spectacles or contact lenses in a large majority of patients.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
Cumulative percentages of visual acuity over various periods of follow-up
Refractive stability over six months
This PDF is available to Subscribers Only