Prof. Michael A. DellaVecchia Profile

Prof. Michael A. DellaVecchia

Director/Professor/Retired

SPIE Involvement:

Author

Proceedings Article | 1 February 2002 Paper

Adaptive system for eye-lens aberration correction based on stochastic parallel gradient descent optimization

Matthew Banta, Mikhail Vorontsov, Michael DellaVecchia, Larry Donoso

Proceedings Volume 4493, (2002) https://doi.org/10.1117/12.454713

KEYWORDS: Eye models, Eye, Mirrors, Image quality, Stochastic processes, Optimization (mathematics), Electrodes, Deformable mirrors, Wavefronts, Aberration correction

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Proceedings Article | 21 May 2001 Paper

Dynamic light scattering in veterinary medicine: refinement of diagnostic criteria

Stephen Dubin, Stanley Zietz, Karl Gabriel, David Gabriel, Michael DellaVecchia, Rafat Ansari

Proceedings Volume 4244, (2001) https://doi.org/10.1117/12.427768

KEYWORDS: Particles, Diagnostics, Dynamic light scattering, Mahalanobis distance, Statistical analysis, Light scattering, Matrices, Opacity, Statistical modeling, Medicine

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Proceedings Article | 22 June 1999 Paper

Dynamic light scattering as an objective noninvasive method in veterinary ophthalmic diagnosis and research

Stephen Dubin, Rafat Ansari, Orien Tulp, Sheldon Steinberg, Seth Koch, Michael DellaVecchia, Mihaela Cozmi, Mary Victor

Proceedings Volume 3590, (1999) https://doi.org/10.1117/12.350982

KEYWORDS: Particles, Proteins, Dynamic light scattering, Opacity, Scattering, Eye, Crystals, Light scattering, Photons, Cornea

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Proceedings Article | 30 April 1999 Paper

Refractive index matching of tissue components as a new technology for correlation and diffusing-photon spectroscopy and imaging

Valery Tuchin, Joseph Culver, Cecil Cheung, Svetlana Tatarkova, Michael DellaVecchia, Dmitry Zimnyakov, Anatoly Chaussky, Arjun Yodh, Britton Chance

Proceedings Volume 3598, (1999) https://doi.org/10.1117/12.347479

KEYWORDS: Scattering, Tissue optics, Tissues, Refractive index, Eye, Light scattering, Diffusion, Imaging spectroscopy, Skin, Polarization

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Proceedings Article | 19 June 1998 Paper

Comparison of photonic and electromagnetic effects on the human leukocyte

Michael DellaVecchia, Richard Beard, D. Feng, Xiaoyan Dai, Kambiz Pourrezaei, Alexander Priezzhev

Proceedings Volume 3252, (1998) https://doi.org/10.1117/12.311894

KEYWORDS: Magnetism, Electromagnetism, Blood, Dielectrics, Dielectric relaxation, Electrodes, In vitro testing, Environmental sensing, Laser damage threshold, Visible radiation

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Proceedings Article | 1 June 1998 Paper

Methodology and apparatus for using the human iris as a robust biometric

Michael DellaVecchia, Thomas Chmielewski, Ted Camus, Marcos Salganicoff, Michael Negin

Proceedings Volume 3246, (1998) https://doi.org/10.1117/12.309451

KEYWORDS: Iris, Iris recognition, Eye, Image processing, Biometrics, Cameras, Image quality, Video, Visualization, Mirrors

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Proceedings Article | 26 May 1997 Paper

Corneal modeling for analysis of photorefractive keratectomy

Michael Della Vecchia, Kathleen Lamkin-Kennard

Proceedings Volume 2971, (1997) https://doi.org/10.1117/12.275114

KEYWORDS: Data modeling, 3D modeling, Cornea, Ray tracing, Eye models, Zemax, Systems modeling, MATLAB, Refraction, Eye

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Procedurally, excimer photorefractive keratectomy is based on the refractive correction of composite spherical and cylindrical ophthalmic errors of the entire eye. These refractive errors are inputted for correction at the corneal plane and for the properly controlled duration and location of laser energy. Topography is usually taken to correspondingly monitor spherical and cylindrical corneorefractive errors. While a corneal topographer provides surface morphologic information, the keratorefractive photoablation is based on the patient's spherical and cylindrical spectacle correction. Topography is at present not directly part of the procedural deterministic parameters. Examination of how corneal curvature at each of the keratometric reference loci affect the shape of the resultant corneal photoablated surface may enhance the accuracy of the desired correction. The objective of this study was to develop a methodology to utilize corneal topography for construction of models depicting pre- and post-operative keratomorphology for analysis of photorefractive keratectomy. Multiple types of models were developed then recreated in optical design software for examination of focal lengths and other optical characteristics. The corneal models were developed using data extracted from the TMS I corneal modeling system (Computed Anatomy, New York, NY). The TMS I does not allow for manipulation of data or differentiation of pre- and post-operative surfaces within its platform, thus models needed to be created for analysis. The data were imported into Matlab where 3D models, surface meshes, and contour plots were created. The data used to generate the models were pre- and post-operative curvatures, heights from the corneal apes, and x-y positions at 6400 locations on the corneal surface. Outlying non-contributory points were eliminated through statistical operations. Pre- and post- operative models were analyzed to obtain the resultant changes in the corneal surfaces during PRK. A sensitivity analysis of the corneal topography system was also performed. Ray tracings were performed using the height data and the optical design software Zemax (Focus Software, Inc., Tucson, AZ). Examining pre- and post-operative values of corneal surfaces may further the understanding of how areas of the cornea contribute toward desired visual correction. Gross resultant power across the corneal surface is used in PRK, however, understanding the contribution of each point to the average power may have important implications and prove to be significant for achieving projected surgical results.

Proceedings Article | 2 May 1997 Paper

Method for the measurement of photonic effects on blood

Michael Della Vecchia, Richard Beard, Xiaoyan Dai, Alexander Priezzhev

Proceedings Volume 2982, (1997) https://doi.org/10.1117/12.273624

KEYWORDS: Blood, Light sources, Light emitting diodes, Particles, Veins, Optical spheres, Biomedical engineering, Electromagnetism, Inflammation, Dielectrics

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Proceedings Article | 10 May 1996 Paper

Photonic effects on mononuclear leukocytes

Xiaoyan Dai, Richard Beard, Michael DellaVecchia, Alexander Priezzhev

Proceedings Volume 2678, (1996) https://doi.org/10.1117/12.239517

KEYWORDS: Light emitting diodes, Blood, Light sources, Wound healing, Proteins, Environmental sensing, Photostimulation, Chlorine, Biomedical engineering, Electrochemical etching

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Proceedings Article | 10 January 1996 Paper

Ophthalmic diagnostics using a new dynamic light scattering fiber optic probe

Rafat Ansari, Kwang Suh, Michael DellaVecchia, Stephen Dubin

Proceedings Volume 2632, (1996) https://doi.org/10.1117/12.229574

KEYWORDS: Eye, Vitreous, Scattering, Light scattering, Laser scattering, Fiber optics, Particles, Semiconductor lasers, In vivo imaging, Diagnostics

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Proceedings Article | 30 May 1995 Paper

Influence of light sources on the migration of polymorphonuclear leukocytes

Michael DellaVecchia, Richard Beard, Xiaoyan Dai

Proceedings Volume 2389, (1995) https://doi.org/10.1117/12.210037

KEYWORDS: Light emitting diodes, Pulsed laser operation, Light sources, Laser damage threshold, Inflammation, Blood, Biomedical engineering, Magnetism, Photons, Near infrared

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