Abstract
In this study, we objectively determined whether the ReSTOR as a multifocal
IOL (intraocular lens) has a multifocal function compared to the IQ as a monofocal
IOL in vivo by OQAS (Optical Quality Analysis System). Eighteen patients who had
cataract surgery with implantation of ReSTOR (27 eyes) and 15 patients with IQ (21
eyes), were included inthis study. Uncorrected distance visual acuity (UCDVA),
corrected distance visual acuity (CDVA), uncorrected near visual acuity (UCNVA)and
distance corrected near visual acuity (DCNVA) were measured. After setting the
artificial pupil size to 3 mm, we performed 'Optical quality'. We inputted
defocus diopters of (objective spherical refraction)(far), (objective spherical
refraction-1.25 D)(intermediate),(objective spherical refraction-2.5 D)(near), and
(objective spherical refraction-3.5 D)(very near) into 'selected spherical
refraction' simulating the optical quality at far, intermediate, and near
distance. We changed the pupil size to 5 mm and repeated the same measurements. The
UCDVA and CDVA did not show significant differences between the 2 groups. But, the
UCNVA and DCNVA of the ReSTOR group were better than those of the IQ group (p=0.000,
p=0.000). For 3 mm pupil, at far distance, modulation transfer function (MTF) cut
off and point spread function (PSF) width at 50% of ReSTOR were worse than those of
IQ (p=0.039, p=0.020). At intermediate distance, MTF cut off, Strehl ratio and PSF
width at 50% of ReSTOR were worse than those of IQ (p=0.001, p=0.001, p=0.000). At
near distance, MTF cut off of ReSTOR was worse than that of IQ (p=0.033). At very
near distance, MTF cut off and Strehl ratio of ReSTOR were worse than those of IQ
(p=0.002, p=0.002), but PSF width at 50% of ReSTOR was better than that of IQ. For 5
mm pupil, most parameters at each distance, there was no significant difference
between the 2 groups. Only PSF width at 50% of ReSTOR were worse than those of IQ at
intermediate distance (p=0.013). It was impossible to show the multifocal function
of ReSTOR compared to the IQ byOQAS.
© 2014 Optical Society of Korea
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