Wavefront Aberrations

Efficient Rendering of Ocular Wavefront Aberrations using Tiled Point‐Spread Function Splatting

Computer Graphics Forum ◽

10.1111/cgf.14267 ◽

2021 ◽

Author(s):

István Csoba ◽

Roland Kunkli

Keyword(s):

Point Spread Function ◽

Wavefront Aberrations ◽

Point Spread ◽

Spread Function

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Predictive control of thermally induced wavefront aberrations

Optics Express ◽

10.1364/oe.21.021530 ◽

2013 ◽

Vol 21 (18) ◽

pp. 21530 ◽

Cited By ~ 15

Author(s):

A. Haber ◽

A. Polo ◽

I. Maj ◽

S.F. Pereira ◽

H.P. Urbach ◽

...

Keyword(s):

Predictive Control ◽

Thermally Induced ◽

Wavefront Aberrations

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Aspheric Intraocular Lenses Implantation for Cataract Patients with Extreme Myopia

ISRN Ophthalmology ◽

10.1155/2014/403432 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Yanwen Fang ◽

Yi Lu ◽

Aizhu Miao ◽

Yi Luo

Keyword(s):

Contrast Sensitivity ◽

Visual Quality ◽

Intraocular Lenses ◽

Wavefront Aberrations ◽

Spatial Frequencies ◽

Aspheric Iol ◽

Significant Difference ◽

Composite Scores ◽

Cataract Patients

Objective. To evaluate the postoperative visual quality of cataract patients with extreme myopia after implantation of aspheric intraocular lenses (IOLs). Methods. Thirty-three eyes were enrolled in this prospectivestudy. Eighteen eyes with an axial length longer than 28 mm were included in the extreme myopia group, and the other 15 eyes were included in the nonextreme myopia group. Phacoemulsification and aspheric IOL implantation were performed. Six months after cataract surgery, best-corrected visual acuity (BCVA), contrast sensitivity, and wavefront aberrations were measured, and subjective visual quality was assessed. Results. The BCVA improved significantly after surgery for both groups, and patients in the nonextreme myopia group achieved better postoperative BCVA due to better retinal status of the eyes. The evaluation of contrast sensitivity without glare was the same in both groups, whereas patients in the nonextreme myopia group performed better at intermediate spatial frequencies under glare conditions. The two groups did not show a significant difference in high-order aberrations. With regard to subjective visual quality, the composite scores of both groups did not differ significantly. Conclusions. Aspheric IOLs provided good visual outcomes in cataract patients with extreme myopia. These patients should undergo careful evaluation to determine the maculopathy severity level before surgery.

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Optimal actuator placement in adaptive optics systems

Journal of Vibration and Control ◽

10.1177/10775463211032449 ◽

2021 ◽

pp. 107754632110324

Author(s):

Berk Altıner ◽

Bilal Erol ◽

Akın Delibaşı

Keyword(s):

Cost Function ◽

Adaptive Optics ◽

Disturbance Attenuation ◽

Linear Quadratic ◽

Placement Problem ◽

Convex Optimization Problem ◽

Wavefront Aberrations ◽

The Cost ◽

Actuator Placement ◽

Quadratic Cost Function

Adaptive optics systems are powerful tools that are implemented to degrade the effects of wavefront aberrations. In this article, the optimal actuator placement problem is addressed for the improvement of disturbance attenuation capability of adaptive optics systems due to the fact that actuator placement is directly related to the enhancement of system performance. For this purpose, the linear-quadratic cost function is chosen, so that optimized actuator layouts can be specialized according to the type of wavefront aberrations. It is then considered as a convex optimization problem, and the cost function is formulated for the disturbance attenuation case. The success of the presented method is demonstrated by simulation results.

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