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

2009 ◽  
Vol 223 (5) ◽  
pp. 320-325 ◽  
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

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

2008 ◽  
Vol 145 (5) ◽  
pp. 827-833.e1 ◽  
Author(s):  
Patrick F. Tzelikis ◽  
Leonardo Akaishi ◽  
Fernando C. Trindade ◽  
Joel E. Boteon
Keyword(s):  
Comparative Study ◽  
Contrast Sensitivity ◽  
Spherical Aberration ◽  
Intraocular Lenses

Research on Thermal Effect and Mode Properties of a Q-Switched Laser by Using Shack-Hartmann Wavefront Sensor

2011 ◽  
Vol 308-310 ◽  
pp. 1444-1447
Author(s):  
Xiang Zhang
Keyword(s):  
Thermal Lens ◽  
Matrix Theory ◽  
Second Harmonic ◽  
Spherical Aberration ◽  
Beam Quality ◽  
Wavefront Sensor ◽  
Wavefront Aberration ◽  
Output Beam ◽  
Lens Effect ◽  
Thermal Lens Effect

Results of an experimental and theoretical analysis of the proprerties of a LD pumped laser using a stable resonator and second harmonic conversion crystal are presented. The influence of thermal lens effect on laser output mode and beam quality has been discussed briefly by using the transfer matrix theory. In this paper, further experiment on the output beam quality of a LD pumped acousto-optic Q-switched laser has been also performed by adopting Shack-Hartmann wavefront sensor and Zernike mode reconstruction theory. Using this method, PV and RMS error of aberration wavefront, the first 35-order Zernike aberrations can be acquired. Furthermore, Strehl ratio curve of output beam and the distribution of circle energy can also be obtained by further calculation, so mode properities can be comprehensively understood. Experimental results show that the beam wavefront aberration is mainly concentrated in the first 15 orders of Zernike aberration, mainly including the defocus A3, the low-order astigmatism A4 and A5, the coma and spherical aberration because of the thermal-lens effect.

scholarly journals Contrast Sensitivity and Spherical Aberration in Eyes Implanted with AcrySof IQ and AcrySof Natural Intraocular Lens: the Results of a Meta-Analysis

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e77860 ◽  
Author(s):  
Jianping Liu ◽  
Jiangyue Zhao ◽  
Liwei Ma ◽  
Guangcong Liu ◽  
Di Wu ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Spherical Aberration ◽  
Meta Analysis

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

2011 ◽  
Vol 21 (6) ◽  
pp. 723-731 ◽  
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.

Spherical aberration and contrast sensitivity after cataract surgery with the Tecnis Z9000 intraocular lens

2006 ◽  
Vol 32 (8) ◽  
pp. 1320-1327 ◽  
Author(s):  
Gonzalo Muñoz ◽  
César Albarrán-Diego ◽  
Robert Montés-Micó ◽  
Antonio Rodríguez-Galietero ◽  
Jorge L. Alió
Keyword(s):  
Cataract Surgery ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Spherical Aberration

Comparative Study of Intraocular Lens Implantation Through 3.2- and 5.5-mm Incisions

Ophthalmology ◽  
1994 ◽  
Vol 101 (7) ◽  
pp. 1183-1190 ◽  
Author(s):  
Tetsuro Oshika ◽  
Shunji Tsuboi ◽  
Shigeo Yaguchi ◽  
Fumiaki Yoshitomi ◽  
Toshiyuki Nagamoto ◽  
...  
Keyword(s):  
Comparative Study ◽  
Intraocular Lens ◽  
Intraocular Lens Implantation ◽  
Lens Implantation

scholarly journals Objective and subjective evaluation of trifocal diffractive intraocular Lens after cataract extraction with phacoemulsification: a prospective clinical study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ahmed A. Zein El-Dein ◽  
Ahmed Elmassry ◽  
Hazem M. El-Hennawi ◽  
Ehab F. Mossallam
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Intraocular Lens ◽  
Subjective Evaluation ◽  
Cataract Extraction ◽  
Prospective Clinical Study ◽  
Gradual Change ◽  
Quality Of Vision ◽  
Defocus Curve

Abstract Background This study aimed to assess visual outcomes, quality of vision and patients’ satisfaction of a trifocal diffractive intraocular lens after cataract surgery with phacoemulsification. Results The study included 36 eyes that underwent implantation of trifocal diffractive intraocular lens (IOL). The residual mean postoperative spherical equivalent was − 0.40 ± 0.29 diopters. Mean Uncorrected distance visual acuity was 0.80 ± 0.16 decimal (snellen equivalent 25 ft) while mean Uncorrected intermediate visual acuity was 0.82 ± 0.31 decimal (snellen equivalent 25 ft) and mean Uncorrected near visual acuity (UCNVA) was 0.87 ± 0.20 decimal (snellen equivalent 23 ft). In defocus curve, there was infinitesimal gradual change between the three foci. Contrast sensitivity was just below the inferior limit of normal. Conclusion Trifocal diffractive IOL created a true intermediate focus proved by VA and defocus curve and better quality of vision assessed by contrast sensitivity and high order aberration. Moreover, it was safe and effective for correcting distance and near vision in these patients. Most of the patients were very satisfied and achieved spectacle independence. Trial registration Registration number and date: NCT04465279 on July 10, 2020.

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