Spherical Aberration and Contrast Sensitivity in Eyes Implanted with Aspheric and Spherical Intraocular Lenses: A Comparative Study

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.

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Spherical Aberration, Contrast Sensitivity and Depth of Focus With Three Aspherical Intraocular Lenses

Journal of the Korean Ophthalmological Society ◽

10.3341/jkos.2009.50.11.1639 ◽

2009 ◽

Vol 50 (11) ◽

pp. 1639 ◽

Cited By ~ 5

Author(s):

Hyoung Won Bae ◽

Eung Kweon Kim ◽

Tae-Im Kim

Keyword(s):

Contrast Sensitivity ◽

Spherical Aberration ◽

Intraocular Lenses ◽

Depth Of Focus

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Clinical Results after Implantation of a Spherical Aberration-Free Intraocular Lens: Effect of Contrast Sensitivity and Wavefront Aberration – A Clinical Comparative Study

Ophthalmologica ◽

10.1159/000219857 ◽

2009 ◽

Vol 223 (5) ◽

pp. 320-325 ◽

Cited By ~ 3

Author(s):

Jin-A Choi ◽

Chan-Young Kim ◽

Kyung-Sun Na ◽

Shin-Hae Park ◽

Choun-Ki Joo

Keyword(s):

Comparative Study ◽

Contrast Sensitivity ◽

Intraocular Lens ◽

Spherical Aberration ◽

Clinical Results ◽

Wavefront Aberration ◽

Lens Effect

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Visual Function and Subjective Quality of Life in Chinese Cataract Patients after Implantation with Aspheric Intraocular Lenses

European Journal of Ophthalmology ◽

10.5301/ejo.2011.6441 ◽

2011 ◽

Vol 21 (6) ◽

pp. 732-740

Author(s):

Yanwen Fang ◽

Yi Lu ◽

Xinhua Wu ◽

Aizhu Miao ◽

Yi Luo

Keyword(s):

Visual Acuity ◽

Contrast Sensitivity ◽

Visual Function ◽

Spherical Aberration ◽

Visual Quality ◽

Intraocular Lenses ◽

Subjective Quality Of Life ◽

Significant Difference ◽

The Mean ◽

Cataract Patients

Purpose. To evaluate and compare the objective and subjective visual function after implantation of 2 aspheric intraocular lenses (IOLs) in Chinese cataract patients. Methods. Forty-one eyes of 28 patients with cataract were randomly assigned to receive either the MC X11 ASP IOL or the AcrySof IQ IOL. Three months postoperatively, best-corrected visual acuity (BCVA), contrast sensitivity, wavefront aberrations, and subjective visual quality were measured. The degree of posterior capsule opacification (PCO) was recorded at last follow-up. Results. Postoperative mean monocular BCVA was 0.05±0.13 logMAR in the MC X11 group and 0.05±0.08 logMAR in the IQ group. There was no significant difference in visual acuity, contrast sensitivity, subjective visual quality, and degree of PCO between the 2 groups. For a 6-mm pupil diameter, the mean spherical aberration (Z40) was 0.075±0.076 μm in the MC X11 group and 0.056±0.111 μm in the IQ group. However, 45.5% and 57.9% of the eyes in the MC X11 and IQ groups had values >0.10 μm, respectively. The mean RMS values of the high-order aberrations were similar between the 2 groups except the higher fifth- and sixth-order aberrations, which were significantly higher in the MC X11 group. Conclusions. Both IOLs provided similar and good visual outcomes. However, the data suggest that the amount of negative spherical aberration generated by current available aspheric IOLs might not be optimal for Chinese eyes.

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Comparison of contrast sensitivity between three aspheric acrylic monofocal intraocular lenses: a prospective randomised trial

Malaysian Journal of Ophthalmology ◽

10.35119/myjo.v1i4.77 ◽

2020 ◽

Vol 1 (4) ◽

pp. 259-283

Author(s):

Chin Chiet Ying Alice ◽

Banumathi Gurusamy ◽

Lim Keat Andrew ◽

Mae-Lynn Catherine Bastion

Keyword(s):

Cataract Surgery ◽

Contrast Sensitivity ◽

Marked Improvement ◽

Spherical Aberration ◽

Controlled Trial ◽

Randomised Trial ◽

Intraocular Lenses ◽

Aspherical Lens ◽

Spatial Frequencies ◽

Significant Difference

Introduction: Evolution of cataract surgery and implantation of intraocular lenses (IOL) with new technological designs to optimise functional vision has been the aim of cataract surgery today. Aspherical lens design is a new lens technology to counteract spherical aberration exerted by a conventional IOL. Purpose: To compare the contrast sensitivity after cataract surgery between aspheric IOLs with negative spherical aberration (Tecnis ZA9003TM and AcrySof IQTM) and zero spherical aberration IOLs (Akreos Adapt Advance Optic [AO]TM). Study design: Interventional, single-blinded, randomised controlled trial. Methods: Ninety-six patients were recruited with 32 eyes in each study arm. All patients underwent standard phacoemulsification with implantation of an aspheric acrylic IOL randomised to one of the three lens models by a single experienced surgeon. Pre- and postoperative contrast sensitivity was analysed using the CSV1000E chart under photopic and mesopic conditions with and without glare testing. Results: All three lenses showed statistically significant improvement in contrast sensitivity postoperatively at all spatial frequencies under photopic, mesopic, and scotopic conditions with glare. There was no statistically significant difference between the groups. Tecnis ZA9003TM showed marked improvement in mesopic contrast sensitivity at 18 cycles/degree (cpd) at 12 weeks (p < 0.05). The zero aberration Akreos Adapt AOTM showed better photopic contrast sensitivity compared to mesopic contrast sensitivity (p > 0.05). Conclusion: AcrySof IQTM, Akreos Adapt AOTM, and Tecnis ZA9003TM performed equally well in contrast sensitivity at all spatial frequencies under photopic and mesopic conditions with and without glare testing. All lenses had statistically significant improvement in contrast sensitivity after cataract surgery. The negative aberration IOL Tecnis ZA9003TM showed marked improvement in mesopic contrast sensitivity at 18 cpd at 12 weeks. The zero aberration IOL, Akreos Adapt AOTM showed better photopic contrast sensitivity compared to mesopic contrast sensitivity.

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Lack of Effect of Intraocular Lens Asphericity on Visual Performance with Acrylic Intraocular Lenses

European Journal of Ophthalmology ◽

10.5301/ejo.2011.6356 ◽

2011 ◽

Vol 21 (6) ◽

pp. 723-731 ◽

Cited By ~ 4

Author(s):

Gonzalo Muñoz ◽

César Albarrán-Diego ◽

Ma Ángeles Galotto ◽

Javier Pascual ◽

Teresa Ferrer-Blasco

Keyword(s):

Visual Acuity ◽

Contrast Sensitivity ◽

Intraocular Lens ◽

Spherical Aberration ◽

Optical Quality ◽

Intraocular Lenses ◽

Bilateral Cataract ◽

Quality Of Vision ◽

Ocular Aberrations

Purpose. To determine whether implantation of acrylic intraocular lens (IOL) with aspheric design (Tecnis Z9003, AMO) results in improved visual acuity or contrast sensitivity compared with conventional spherical acrylic IOL (AR40e, AMO). Methods. In an intraindividual randomized prospective study of 60 patients with bilateral cataract, the Tecnis Z9003 IOL was compared with the AR40e IOL. Ocular aberrations for a 4.0-mm pupil and 6.0-mm pupil were measured with a Hartmann-Shack aberrometer. Quality of vision was measured using visual acuity and contrast sensitivity under mesopic and photopic conditions. Results. Eyes with the Tecnis Z9003 IOL had significantly less spherical aberration and greater Strehl ratio after surgery, showing a better optical quality in comparison with the standard spherical IOL. However, visual acuity and both mesopic and photopic contrast sensitivity were not significantly different between the groups. Conclusions. The significantly better optical quality achieved with the aspheric acrylic IOL design did not result in improved visual acuity or contrast sensitivity in comparison with a conventional spherical acrylic IOL.

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