Effect of iris registration on outcomes of FEMTOLASIK for myopia and myopic astigmatism.

Abstract:

PURPOSE:To compare the visual and refractive outcomes after FEMTOLASIK with and without iris registration. METHODS:In this randomized, prospective, comparative, contralateral eye study, 118 eyes of 59 patients with myopia and myopic astigmatism underwent LASIK using the Femto LDV femtosecond laser (160 µm) and the MEL80 with or without iris registration. For each patient, iris registration FEMTOLASIK was performed on one eye and non-iris registration FEMTOLASIK was performed on the other eye, assigned at random. Patients were evaluated before and 12 months. Uncorrected visual acuity, best-corrected visual acuity, manifest refraction, contrast sensitivity, and higher-order aberrations (HOAs) were evaluated. RESULTS:At 12 months, the mean UDVA was 0.002 ± 0.07 logMAR (20/19) in iris registration eyes and 0.00 ± 0.06 logMAR (20/24) in non-iris registration eyes (P = 0.9). 61% of iris registration eyes and 71.2% of non-iris registration eyes achieved a UDVA of 20/20 or better (P = 0.31); 98.3% of eyes with the iris registration FEMTOLASIK and 94.9% with the non-iris registration FEMTOLASIK were within ±0.50 D from emmetropia (P = 0.71). No statistically significant difference was found in postoperative contrast sensitivity between groups at 3, 6, 12, or 18 cycles/degree (P > 0.05). There was significant increase in total HOA root mean square in two groups. The mean error magnitude of surgically induced astigmatism 12 months postoperatively was -0.33 in iris registration eyes and -0.24 in the non-iris registration eyes (P = 0.36). CONCLUSIONS:FEMTOLASIK with and without iris registration provides similar results in myopic and myopic astigmatism patients.

journal_name

Int Ophthalmol

authors

Ghoreishi M,Beni ZN,Beni AN,Kianersi F

doi

10.1007/s10792-017-0703-3

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

2077-2087

issue

5

eissn

0165-5701

issn

1573-2630

pii

10.1007/s10792-017-0703-3

journal_volume

38

pub_type

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