Incidence and outcomes of LASIK free cap . Tanguy Boutin, MSc , Eser Adiguzel, PhD, Avi Wallerstein, MD, Mark Cohen, MD, Mona Harissi-Dagher, MD The authors have no financial interest in the subject matter of this poster. Background.
Tanguy Boutin, MSc, Eser Adiguzel, PhD, Avi Wallerstein, MD, Mark Cohen, MD, Mona Harissi-Dagher, MD
The authors have no financial interest in the subject matter of this poster.
Some of the most serious complications of LASIK are linked to the use of the microkeratome.1 The flap can be thin, irregular, buttonhole, incomplete or a dislocated/free cap.
Possible causative factors are flat corneas, deep orbits, inadequate suction, decentered ring placement, and faulty microkeratome blades.2
To determine the incidence, management, and visual outcomes of LASIK free cap following a microkeratome cut.
Retrospective observational case series of 183,941 consecutive LASIK surgeries between 2007 and 2010 in a high volume refractive surgery setting, using standardized equipment and techniques to determine the incidence of intra-operative free cap.
Primary outcome measurements:
Further corrective surgery was documented as well.
7 eyes of 7 patients were indentified as having an intra-operative free cap out of 183,941 LASIK procedures performed, resulting in an incidence of free cap of 0.004%.
Post-operative follow-up: 2 weeks - 27 months.
Four of the 7 eyes have long-term follow-up of over 6.5 months.
One patient did not have further laser correction, lost 2 lines of UDVA and 1 line of CDVA with mild haze development.
Additional corrective surgery was performed in the other three patients, at various times after free cap occurrence. UDVA was greatly increased in those eyes. Only one eye lost one line of CDVA.
19 months post-free cap
9 months post-free cap (pre-enhancement)
22 months post-free cap (post-enhancement)
2 months post-free cap (Pre-PRK)
3.5 months post-free cap (Pre-PRK)
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