|
KMID : 1159320160180030309
|
|
Korean Journal of Vision Science
2016 Volume.18 No. 3 p.309 ~ p.319
|
|
|
Evaluation of Visual Quality after Femtosecond Laser LASIK
|
|
Kim Hui-June
Lee Koon-Ja
|
|
|
Abstract
|
|
|
Purpose: To investigate visual quality with double-pass technique after LASIK using a Femtosecond Laser.
Methods: We examined 43 patients of moderate and high myopia (mean manifest spherical equivalent: -3.93 ± 1.48 D, 85 eyes, mean age: 26.35 ± 6.86 years) undergoing Feomtosecond Laser LASIK (FS-LASIK). Visual quality was assessed with a Optical Quality Analysis System (OQAS) before and 1 week and 1 month after surgery. The modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scattering index (OSI) and OQAS values (OVs) were measured and
these variables were compared.
Results: The mean MTF cutoff frequency, Strehl ratio, OSI, OV100%, OV20%, OV9% were 41.67 ± 9.99 cycles/degree, 0.24 ± 0.06, 0.45 ± 0.19, 1.41 ± 0.28, 1.06 ± 0.26, and 0.66 ± 0.18, respectively, 1 months after FS-LASIK and no significant differences compared to the baseline results (MTF p=0.23 Strehl ratio p=0.19, OSI p=0.19). There were no differences in OVs at contrasts of 100% (p=0.95), 20% (p=0.10), and 9% (p=0.10) 1 months after FS-LASIK compared to the baseline results.
Conclusions: The visual quality 1 month after FS-LASIK was not significantly different compared to the eyes corrected with spectacle lenses before the surgery, suggesting that FS-LASIK provide a good visual quality.
|
|
|
KEYWORD
|
|
|
Feomtosecond Laser, LASIK, double-pass technique, visual quality, OQAS value
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|