Premium
Evaluation of tear film osmolarity after mechanical lasik, femtosecond laser‐assisted sub‐bowman keratomileusis and lasek
Author(s) -
CANADAS SUAREZ P,
GARCIAGONZALEZ M,
ORTEGA MARIA,
TEUS M
Publication year - 2011
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2011.2175.x
Subject(s) - microkeratome , lasik , keratomileusis , osmole , medicine , ophthalmology , osmotic concentration , significant difference , surgery , cornea
Purpose To evaluate the tear osmolarity in patients that underwent LASIK (performed with a microkeratome or a femtosecond laser) or LASEK three months before. Methods We performed a prospective observational study of consecutive eyes that had LASIK performed with a mechanical microkeratome (MM‐LASIK), with a femtosecond laser (FS‐LASIK) or that had LASEK. Three months postop, tear osmolarity was measured with the TearLab TM Osmolarity System. This measure was performed only in one eye per patient. A normality value of 308 ± 5 mOsm/L (provided by the manufacturer) was used to clasify the tear osmolarity. Results 105 eyes of 105 patients were included in the study (35 eyes in each group). No significant differences were found in the mean preoperative refractive defect and patient age between groups. Three months postop, mean osmolarity values were 304.8 ± 20.2 mOsm/L (range, 275 to 371) in the MM‐LASIK group; 306.8 ± 17.7 mOsm/L (range, 280 to 342) in the FS‐LASIK group and 307.9 ± 17.6 mOsm/L (range, 280 to 374) in the LASEK group. After three months, there was no statistically significant difference in tear osmolarity between the groups. Conclusion Our results suggest that tear film osmolarity measured with the TearLabTM Osmolarity system tends to achieve normal values three months after MM‐LASIK, FS‐LASIK and LASEK.