Prof. Arthur Ho Profile

Prof. Arthur Ho

SPIE Involvement:

Conference Program Committee | Author | Editor

Websites:

Company Website

Publications (29)

Proceedings Article | 4 March 2022 Presentation + Paper

Measurements of mechanical steady-state accommodation fluctuations using optical coherence tomography

Leana Rohman, Marco Ruggeri, Yu-Cherng Chang, Alex Gonzalez, Arthur Ho, Jean-Marie Parel, Fabrice Manns

Proceedings Volume 11941, 1194107 (2022) https://doi.org/10.1117/12.2608274

KEYWORDS: Eye, Optical coherence tomography, Heart, Ultrasonography, Image segmentation, Vitreous, Software development, Refractive index, Oximeters, Optical switching, Lenses

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Proceedings Article | 5 March 2021 Presentation

High speed biometry of the crystalline lens during accommodation with swept source OCT

Marco Ruggeri, Yu-Cherng Chang, Gabrielle Monterano Mesquita, Giulia Belloni, Siobhan Williams, Arthur Ho, Jean-Marie Parel, Fabrice Manns

Proceedings Volume 11623, 116230P (2021) https://doi.org/10.1117/12.2582794

KEYWORDS: Crystals, Optical coherence tomography, Mechanics, Imaging systems, Image segmentation, High speed imaging, Crystallography

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Proceedings Article | 13 March 2019 Presentation

Spherical aberration of the crystalline lens measured in-vitro using an LRT-OCT system (Conference Presentation)

Siobhan Williams, Marco Ruggeri, Bianca Heilman, Yu-Cherng Chang, Ashik Mohamed, Geetha Sravani, Cornelis Rowaan, Alex Gonzalez, Arthur Ho, Jean-Marie Parel, Fabrice Manns

Proceedings Volume 10858, 108580G (2019) https://doi.org/10.1117/12.2508664

KEYWORDS: Monochromatic aberrations, Crystals, In vitro testing, Software development, Geometrical optics, Biometrics, 3D image processing, Optical coherence tomography, Raster graphics, Tissues

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Proceedings Article | 14 March 2018 Presentation

Objective dynamic changes in lens curvature during accommodation using optical coherence tomography images (Conference Presentation)

Siobhan Williams, Giovanni Gregori, Marco Ruggeri, Yu-Cherng Chang, Florence Cabot, Arthur Ho, Sonia Yoo, Jean-Marie Parel, Fabrice Manns

Proceedings Volume 10474, 1047419 (2018) https://doi.org/10.1117/12.2295005

KEYWORDS: Optical coherence tomography, Calibration, Optical spheres, In vivo imaging, Visualization, Detection and tracking algorithms, Image analysis

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Proceedings Article | 27 February 2018 Paper

Lesion detection in ultra-wide field retinal images for diabetic retinopathy diagnosis

Anastasia Levenkova, Arcot Sowmya, Michael Kalloniatis, Angelica Ly, Arthur Ho

Proceedings Volume 10575, 1057531 (2018) https://doi.org/10.1117/12.2293434

KEYWORDS: Image classification, Computing systems, Retina, Cameras, Detection and tracking algorithms, Eye, Computer aided diagnosis and therapy, Convolutional neural networks, Feature extraction, Image resolution

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Proceedings Article | 16 May 2017 Presentation

Combined laser-ray tracing and OCT system for biometry of the crystalline lens (Conference Presentation)

Marco Ruggeri, Bianca Maceo Heilman, Yue Yao, Yu-Cherng Chang, Alex Gonzalez, Cornelis Rowaan, Ashik Mohamed, Siobhan Williams, Heather Durkee, Juan Silgado, Andres Bernal, Esdras Arrieta-Quintero, Arthur Ho, Jean-Marie Parel, Fabrice Manns

Proceedings Volume 10045, 100451F (2017) https://doi.org/10.1117/12.2256235

KEYWORDS: Biophysics, Holmium, Optical coherence tomography, Crystals, Laser crystals, Eye, Refractive index, Imaging systems, Laser development, Refractor telescopes

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Proceedings Article | 3 March 2017 Presentation + Paper

Automatic detection of diabetic retinopathy features in ultra-wide field retinal images

Anastasia Levenkova, Arcot Sowmya, Michael Kalloniatis, Angelica Ly, Arthur Ho

Proceedings Volume 10134, 101341M (2017) https://doi.org/10.1117/12.2253980

KEYWORDS: Retina, Computer aided diagnosis and therapy, Algorithm development, Detection and tracking algorithms, Retinal scanning, Image classification, Laser applications, Cameras, Image resolution, Feature extraction, Eye, Imaging systems

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Proceedings Article | 26 April 2016 Presentation

Simultaneous refraction measurement and OCT axial biometry of the eye during accommodation (Conference Presentation)

Carolina De Freitas, Victor Hernandez, Marco Ruggeri, Heather Durkee, Siobhan Williams, Giovanni Gregori, Arthur Ho, Fabrice Manns, Jean-Marie Parel

Proceedings Volume 9693, 969315 (2016) https://doi.org/10.1117/12.2218145

KEYWORDS: Refraction, Optical coherence tomography, Eye, Wavefront sensors, Holmium, Biometrics, Optical alignment, Data acquisition, Optical spheres, Optical switching

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Proceedings Article | 12 March 2015 Paper

Determining the optomechanical properties of accommodating gel for lens refilling surgery using finite element analysis and numerical ray-tracing

Hooman Mohammad-Pour, Sangarapillai Kanapathipillai, Fabrice Manns, Arthur Ho

Proceedings Volume 9307, 930715 (2015) https://doi.org/10.1117/12.2076093

KEYWORDS: Geometrical optics, Ions, Finite element methods, Data modeling, Crystals, Refractive index, Surgery, Mechanics, Protactinium, Amplifiers

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Proceedings Article | 28 February 2014 Paper

Finite element study on the effects of GRIN order on the accommodative response of the human crystalline lens

Hooman Mohammad-Pour, Sangarapillai Kanapathipillai, Fabrice Manns, Arthur Ho

Proceedings Volume 8930, 89300R (2014) https://doi.org/10.1117/12.2044430

KEYWORDS: GRIN lenses, Refractive index, Crystals, Data modeling, Crystallography, Geometrical optics, Optical components, Eye, Numerical analysis, Computing systems

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Proceedings Article | 18 February 2009 Paper

A theoretical design of gradient index multifocal contact lens for correcting presbyopia and an attempt to elicit its performance using ray tracing

Ravi Bakaraju, Klaus Ehrmann, Eric Papas, Arthur Ho

Proceedings Volume 7163, 716319 (2009) https://doi.org/10.1117/12.808653

KEYWORDS: GRIN lenses, Aspheric lenses, Eye models, Contact lenses, Eye, Gradient-index optics, Monochromatic aberrations, Ray tracing, Modulation transfer functions, Lens design

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Proceedings Article | 18 February 2009 Paper

Working sketch of an anatomically and optically equivalent physical model eye

Ravi Chandra Bakaraju, Klaus Ehrmann, Darrin Falk, Eric Papas, Arthur Ho

Proceedings Volume 7163, 716316 (2009) https://doi.org/10.1117/12.808646

KEYWORDS: Eye models, Eye, Visual process modeling, Performance modeling, Contact lenses, Data modeling, Cornea, Cameras, Calibration, Refractive index

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Proceedings Article | 18 February 2009 Paper

Change in peripheral refraction and curvature of field of the human eye with accommodation

Arthur Ho, Frederik Zimmermann, Andrew Whatham, Aldo Martinez, Stephanie Delgado, Percy Lazon de la Jara, Padmaja Sankaridurg

Proceedings Volume 7163, 716318 (2009) https://doi.org/10.1117/12.812110

KEYWORDS: Refraction, Eye, Monochromatic aberrations, Retina, Visualization, Refractor telescopes, Eye models, Aberration theory, Optical components, Cornea

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Proceedings Article | 7 March 2006 Paper

Measurement of ocular parameters under various directions of gaze

Klaus Ehrmann, Fabian Conrad, Eric Papas, Arthur Ho

Proceedings Volume 6138, 61381W (2006) https://doi.org/10.1117/12.674410

KEYWORDS: Eye, Cameras, Contact lenses, Lenses, Image analysis, Edge detection, Error analysis, Head, Lens design, CCD cameras

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Lid angles and aperture size are important factors for fitting and on-eye performance of contact lenses. In particular, toric and translating bifocal lenses rely on predictable interaction with the eyelid for successful positioning and orientation. Traditionally, lid assessment and fitting evaluation is performed under slit lamp observation. Observations are limited to primary gaze and nasal or temporal directions. Quantification of lid parameters and lens positioning is subjective and depended on the skill of the practitioner. No commercial instrument is available off the shelf, which would be suitable to measure objectively ocular parameters and/or contact lens positioning under different directions of gaze. This is the likely reason why only one study has been published in which ocular characteristics for different gaze angles were obtained [1]. However, only a limited number of parameters and gaze directions were investigated. Almost all contact lenses are designed for and assessed under primary gaze. Considering that patients constantly change their gaze while wearing contact lenses, the quantification of contact lens movement and changes in ocular parameters with eye movement can contribute substantially to the understanding of lens performance and thereby lead to improved lens designs. This is of particular importance for toric and translating bifocal lenses. Their complex optical and topographical design requires precise positioning, orientation and movement with changes in gaze direction in order to provide adequate vision. Baron [2] suggested that the lower eyelid is the most important factor for lens movement of translating bifocal lenses, but questions still remained on the complete dynamics of on eye behaviour. For toric contact lenses, the rotational orientation is more important than vertical translation to obtain optimum visual correction. Most toric lenses feature a prism ballast design. Blinking movements, mainly of the upper eyelid, interact with the wedge like shape and squeeze the thick part downwards. It has been observed that the upper eyelid does not move in a straight downward movement, but also twists slightly to close the temporal side first [3]. Precise quantification of this motion and how it affects the contact lens movement have not been reported. A new instrument was designed and constructed to provide objective measurements of ocular parameters.

Proceedings Article | 18 April 2005 Paper

Evaluation of the performance of crystalline lens refilled with polymer gel with an improved ex vivo accommodation simulator

Klaus Ehrmann, Arthur Ho

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.599223

KEYWORDS: Lenses, Crystals, Eye, Sclera, Plastic lenses, Refractive index, CCD cameras, Motion measurement, Polymers, Silicon

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Proceedings Article | 13 July 2004 Paper

Finite element modelling of soft contact lens flexure and aberrations

Arthur Ho, Simon Evans

Proceedings Volume 5314, (2004) https://doi.org/10.1117/12.537918

KEYWORDS: Monochromatic aberrations, Eye, Finite element methods, Contact lenses, Cornea, Zemax, 3D modeling, Lens design, Geometrical optics, Eye models

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Proceedings Article | 13 July 2004 Paper

Ex vivo accommodation simulator II: concept and preliminary results

Klaus Ehrmann, Arthur Ho, Jean-Marie Parel

Proceedings Volume 5314, (2004) https://doi.org/10.1117/12.539111

KEYWORDS: Transducers, Eye, Crystals, Motion measurement, Sclera, Calibration, Tissues, Device simulation, Adhesives, Latex

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Proceedings Article | 13 July 2004 Paper

Effect of the internal optics on the outcome of custom-LASIK in an eye model

Fabrice Manns, Arthur Ho, Jean-Marie Parel

Proceedings Volume 5314, (2004) https://doi.org/10.1117/12.540883

KEYWORDS: Monochromatic aberrations, Eye models, Eye, Cornea, Surgery, Wavefront aberrations, Wavefronts, 3D modeling, OSLO, Biomedical optics

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Proceedings Article | 13 July 2004 Paper

Modelling the performance of accommodating intraocular lenses

Arthur Ho, Fabrice Manns, Therese Pham, Simon Evans, Jean-Marie Parel

Proceedings Volume 5314, (2004) https://doi.org/10.1117/12.540879

KEYWORDS: Eye models, Eye, Optical components, Cornea, Modeling, Performance modeling, Retina, Intraocular lenses, Crystals, Vitreous

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Proceedings Article | 14 July 2003 Paper

Aberrations of the tear-lens: soft contact lenses

Arthur Ho, Therese Pham

Proceedings Volume 4951, (2003) https://doi.org/10.1117/12.479470

KEYWORDS: Spherical lenses, Contact lenses, Modulation transfer functions, Eye, Eye models, Modeling, Spatial frequencies, Performance modeling, Visualization, Cornea

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Proceedings Article | 7 June 2001 Paper

Calculation of the primary spherical aberration of an eye model using paraxial ray tracing with matrix optics

Fabrice Manns, Arthur Ho, Jean-Marie Parel

Proceedings Volume 4245, (2001) https://doi.org/10.1117/12.429290

KEYWORDS: Eye, Eye models, Monochromatic aberrations, Cornea, LASIK, Optical matrix switches, Surgery, Laser vision correction, Spherical lenses, Refraction

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Proceedings Article | 7 June 2001 Paper

Corneal modeling using conic section fits of PAR corneal topography system measurements

Stanley Zipper, Fabrice Manns, Viviana Fernandez, Samith Sandadi, Arthur Ho, Jean-Marie Parel

Proceedings Volume 4245, (2001) https://doi.org/10.1117/12.429261

KEYWORDS: Cornea, Eye, Eye models, Microscopes, MATLAB, Optical spheres, Medical research, Shape analysis, Monochromatic aberrations, Systems modeling

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Proceedings Article | 7 June 2001 Paper

Measurement of the topography of human cadaver lenses using the PAR corneal topography system

Viviana Fernandez, Fabrice Manns, Stanley Zipper, Samith Sandadi, Marie Hamaoui, Hassan Tahi, Arthur Ho, Jean-Marie Parel

Proceedings Volume 4245, (2001) https://doi.org/10.1117/12.429262

KEYWORDS: Eye, Lenses, Crystals, Eye models, Cornea, Microscopes, Natural surfaces, Polymers, Ophthalmology, Medical research

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Proceedings Article | 7 June 2001 Paper

Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz

Arthur Ho, Paul Erickson, Fabrice Manns, Therese Pham, Jean-Marie Parel

Proceedings Volume 4245, (2001) https://doi.org/10.1117/12.429263

KEYWORDS: Refractive index, Eye models, Polymers, Photorefractive polymers, Eye, Crystals, Ray tracing, Cornea, Aspheric lenses, Spherical lenses

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Proceedings Article | 7 June 2000 Paper

Knife-edge system for evaluating contact lenses

Arthur Ho, Klaus Ehrmann

Proceedings Volume 3908, (2000) https://doi.org/10.1117/12.387512

KEYWORDS: Contact lenses, Light sources, Objectives, Optical design, Calibration, Visualization, Optics manufacturing, Standards development, Lens design, Aspheric lenses

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Proceedings Article | 7 June 2000 Paper

Intraocular implants for the surgical correction of presbyopia

Jean-Marie Parel, Pascal Rol, Hassan Tahi, Fabrice Manns, Peter Milne, Marie Hamaoui, Arthur Ho, Brien Holden

Proceedings Volume 3908, (2000) https://doi.org/10.1117/12.387514

KEYWORDS: Eye, Polymers, Crystals, Surgery, Cornea, Intraocular lenses, Clinical trials, Tissues, Monochromatic aberrations, Visualization

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Proceedings Article | 7 June 2000 Paper

Ex-vivo testing of crystalline lens substitutes: a pilot study

Marie Hamaoui, Jean-Marie Parel, Fabrice Manns, Hassan Tahi, Arthur Ho, Brien Holden

Proceedings Volume 3908, (2000) https://doi.org/10.1117/12.387515

KEYWORDS: Eye, Polymers, Crystals, In vivo imaging, Cornea, Microscopes, Eye models, Surgery, Photography, Vitreous

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Proceedings Article | 7 June 2000 Paper

Dacryomeniscometry: an early attempt

Arthur Ho, Eric Papas, Kaykhosrow Keshavarzi, Edward Lum, Klaus Ehrmann

Proceedings Volume 3908, (2000) https://doi.org/10.1117/12.387530

KEYWORDS: Detection and tracking algorithms, Algorithm development, Eye, Cameras, Aspheric lenses, Computer simulations, Imaging systems, Image analysis, Error control coding, Cornea

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Proceedings Article | 21 July 1994 Paper

Peripheral light focusing by the anterior segment

Anthony Maloof, Arthur Ho, Minas Coroneo

Proceedings Volume 2134, (1994) https://doi.org/10.1117/12.180816

KEYWORDS: Eye, Ray tracing, Eye models, Cornea

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Showing 5 of 29 publications

Proceedings Volume Editor (20)

SPIE Conference Volume | 9 March 2020

Ophthalmic Technologies XXX

SPIE Conference Volume | 7 June 2019

Ophthalmic Technologies XXIX

SPIE Conference Volume | 11 April 2018

Ophthalmic Technologies XXVIII

SPIE Conference Volume | 21 March 2017

Ophthalmic Technologies XXVII

SPIE Conference Volume | 2 May 2016

Ophthalmic Technologies XXVI

Showing 5 of 20 publications

Conference Committee Involvement (25)

Ophthalmic Technologies XXXV

25 January 2025 | San Francisco, California, United States

Ophthalmic Technologies XXXIV

27 January 2024 | San Francisco, California, United States

Ophthalmic Technologies XXXIII

28 January 2023 | San Francisco, California, United States

Ophthalmic Technologies XXXII

22 January 2022 | San Francisco, California, United States

Ophthalmic Technologies XXXI

6 March 2021 | Online Only, California, United States

Ophthalmic Technologies XXX

1 February 2020 | San Francisco, California, United States

Ophthalmic Technologies XXIX

2 February 2019 | San Francisco, California, United States

Ophthalmic Technologies XXVIII

27 January 2018 | San Francisco, California, United States

Ophthalmic Technologies XXVII

28 January 2017 | San Francisco, California, United States

Ophthalmic Technologies XXVI

13 February 2016 | San Francisco, California, United States

Ophthalmic Technologies XXV

7 February 2015 | San Francisco, California, United States

Ophthalmic Technologies XXIV

1 February 2014 | San Francisco, California, United States

Ophthalmic Technologies XXIII

2 February 2013 | San Francisco, California, United States

Ophthalmic Technologies XXII

21 January 2012 | San Francisco, California, United States

Ophthalmic Technologies XXI

22 January 2011 | San Francisco, California, United States

Ophthalmic Technologies XX

23 January 2010 | San Francisco, California, United States

Ophthalmic Technologies XIX

24 January 2009 | San Jose, California, United States

Ophthalmic Technologies XVIII

19 January 2008 | San Jose, California, United States

Ophthalmic Technologies XVII

20 January 2007 | San Jose, California, United States

Ophthalmic Technologies XVI

21 January 2006 | San Jose, California, United States

Ophthalmic Technologies XV

22 January 2005 | San Jose, CA, United States

Ophthalmic Technologies XIV

24 January 2004 | San Jose, CA, United States

Ophthalmic Technologies XIII

25 January 2003 | San Jose, CA, United States

Ophthalmic Technologies XII

19 January 2002 | San Jose, CA, United States

Ophthalmic Technologies XI

20 January 2001 | San Jose, CA, United States

Showing 5 of 25 Conference Committees

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