Official ESCRS | European Society of Cataract & Refractive Surgeons
Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Presbyopia management with Q factor modulation (F-CAT): visual and refractive outcome

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Session Details

Session Title: Corneal and Intraocular Correction of Presbyopia

Session Date/Time: Monday 12/09/2016 | 08:00-09:30

Paper Time: 08:06

Venue: Hall C2

First Author: : S.Ouanezar FRANCE

Co Author(s): :    P. Loriaut   B. Anne-Charlotte   A. Barbara   B. Nacim   B. Vincent   L. Laurent     

Abstract Details


To analyze distance and near vision after hyperopic presbyopia surgery using Q-factor modification of the F-CAT program, with a particular focus on the postoperative quality of vision.


This is a retrospective study, analyzing a consecutive serie of presbyopic hyperopic patients undergoing refractive surgery by modulating the Q factor by the F-CAT program.


The surgical technique used was hyperopic LASIK, emmetropisant on the dominant eye, and with a myopisation and change in the Q factor set at -0.8 on the non dominant eye.The postoperative follow-up included slit lamp examination, monocular and binocular uncorrected distance and near visual acuity, and best corrected distance visual acuity. Corneal pachymetry, corneal topography and aberrometry, and a satisfaction scale were additionally performed at the 6 month examination


76 eyes of 38 patients were included in this study. The mean age at surgery was 54 years. The binocular corrected visual acuity averaged -0,1 logMAR for distance vision and +0,06 logMAR for near vision preoperatively. Postoperatively, non corrected binocular visual acuity was -0,1 logMAR for distance vision and +0,36 logMAR for near vision. The spherical equivalent averaged -0,36D on the eye corrected for distance vision. The difference between postoperative binocular uncorrected visual acuity and preoperative binocular best corrected visual acuity was statistically significant for distance vision (p = 0.0072) but not in near vision (p> 0.05). Two eyes requiered retreatment. 33 patients were satisfied or very satisfied with the visual result.


This technique aims compensation of presbyopia by changing the Q factor on the non dominant eye for a greater depth of field. The results in terms of visual acuity and quality are satisfactory. However few patients require additional correction in certain conditions. Patient selection and expectation management is essential to achieve patient satisfaction.

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