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Effect of Spherical Aberration on the Optical Quality after Implantation of Two Different Aspherical Intraocular Lenses.

ABSTRACT: PURPOSE:To compare the effect of spherical aberration on optical quality in eyes with two different aspherical intraocular lenses. METHODS:120 eyes of 60 patients underwent phacoemulsification. In patients' eyes, an aberration-free IOL (Aspira-aA; Human Optics) or an aberration-correcting aspherical IOL (Tecnis ZCB00; Abott Medical Optics) was randomly implanted. After surgery, contrast sensitivity and wavefront measurements as well as tilt and decentration measurements were performed. RESULTS:Contrast sensitivity was significantly higher in eyes with Aspira lens under mesopic conditions with 12 cycles per degree (CPD) and under photopic conditions with 18 CPD (p = 0.02). Wavefront measurements showed a higher total spherical aberration with a minimal pupil size of 4?mm in the Aspira group (0.05?±?0.03) than in the Tecnis group (0.03?±?0.02) (p = 0.001). Strehl ratio was higher in eyes with Tecnis (0.28?±?0.17) with a minimal pupil size larger than 5?mm than that with Aspira (0.16?±?0.14) (p = 0.04). In pupils with a minimum diameter of 4?mm spherical aberration had a significant effect on Strehl ratio, but not in pupils with a diameter less than 4?mm. CONCLUSIONS:Optical quality was better in eyes with the aberration-correcting Tecnis IOL when pupils were large. In contrast, this could not be shown in eyes with pupils under 4?mm or larger. This trial is registered with Clinicaltrials.gov NCT03224728.

SUBMITTER: Lasta M

PROVIDER: S-EPMC5576434 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Effect of Spherical Aberration on the Optical Quality after Implantation of Two Different Aspherical Intraocular Lenses.

Lasta Michael M Miháltz Kata K Kovács Illés I Vécsei-Marlovits Pia Veronika PV

Journal of ophthalmology 20170816

<h4>Purpose</h4>To compare the effect of spherical aberration on optical quality in eyes with two different aspherical intraocular lenses.<h4>Methods</h4>120 eyes of 60 patients underwent phacoemulsification. In patients' eyes, an aberration-free IOL (Aspira-aA; Human Optics) or an aberration-correcting aspherical IOL (Tecnis ZCB00; Abott Medical Optics) was randomly implanted. After surgery, contrast sensitivity and wavefront measurements as well as tilt and decentration measurements were perfo ...[more]

PMID: 28900544

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Project description:PurposeTo compare the peripheral refraction and spherical aberration profiles along three visual field meridians of 16 commercial single vision (SV), bifocal (BF) and multifocal (MF) test contact lenses with a single vision control.MethodForty-four participants [24.2±2.4 years, SE: -0.50 to -4.50D] were randomly fitted, contra-laterally, with 6 SV's [Air Optix Aqua (control), Acuvue Oasys, Biofinity, Clariti, Night & Day and Proclear], 3 BF's [Acuvue Bifocal low and high add, MiSight] and 8 MF's [Proclear D & N in 1.5 and 2.5D adds; AirOptix, PureVision low & high adds]. Peripheral refraction was performed across horizontal, oblique and vertical meridians, with lenses on eye using the BHVI-EyeMapper. The power vectors M, J0, J45 and the spherical aberration coefficient were analysed. The peripheral refraction and aberration profiles of the test lenses were compared with the profiles of the control lens using curvature and slope coefficients.ResultsCompared to the control, a relative peripheral hyperopic shift (M), a less negative J0 curvature coefficient along the horizontal meridian, a less positive J0 curvature coefficient along the vertical meridian, a less negative J45 curvature coefficient along the oblique meridian and a more positive spherical aberration curvature coefficient along most meridians was seen with the Acuvue Bifocal and all center-near multifocal lenses. For the center-distance multifocal lenses the direction of the curvature coefficients of the same refraction and aberration components was opposite to that of the center-near lenses. The greatest differences in the slope coefficients when compared to the control were found for the Acuvue Bifocal lenses and all multifocal contact lenses for the refractive component M and the spherical aberration coefficient along the horizontal visual field meridian, with the Acuvue Bifocal and the center-near multifocal lenses having more positive coefficients and the center-distance lenses having more negative coefficients.ConclusionWhen worn on eye, different commercially available lens types produce differences in the direction and magnitude of the peripheral refraction and spherical aberration profiles along different visual field meridians. This information may be relevant to refractive development and myopia control.

Dataset Information

Effect of Spherical Aberration on the Optical Quality after Implantation of Two Different Aspherical Intraocular Lenses.

Publications

Effect of Spherical Aberration on the Optical Quality after Implantation of Two Different Aspherical Intraocular Lenses.

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