International Ophthalmology

, Volume 38, Issue 5, pp 2077–2087 | Cite as

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

  • Mohammad Ghoreishi
  • Zahra Naderi Beni
  • Afsaneh Naderi BeniEmail author
  • Farzan Kianersi
Original Paper



To compare the visual and refractive outcomes after FEMTOLASIK with and without iris registration.


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.


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).


FEMTOLASIK with and without iris registration provides similar results in myopic and myopic astigmatism patients.


FEMTOLASIK Myopia Iris registration Outcomes 


Compliance with ethical standards

Conflict of interest

Authors do not have any financial interest in any products mentioned in this article.

Human and animal rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  • Mohammad Ghoreishi
    • 1
  • Zahra Naderi Beni
    • 2
  • Afsaneh Naderi Beni
    • 3
    Email author
  • Farzan Kianersi
    • 1
  1. 1.Department of ophthalmologyIsfahan University of Medical ScienceIsfahanIran
  2. 2.Department of radiation oncologyIsfahan University of Medical SciencesIsfahanIran
  3. 3.Department of ophthalmologyShahrekord University of Medical SciencesShahrekordIran

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