Dr. Ezra Maguen Profile

Dr. Ezra Maguen

at American Eye Institute

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 12 February 2011 Paper

Improved method of laser thermal keratoplasty to overcome presbyopia

K. Jonathan Rodgers, Harry Glen, James Salz, Ezra Maguen, Michael Berry

Proceedings Volume 7885, 78850N (2011) https://doi.org/10.1117/12.878330

KEYWORDS: Cornea, Sapphire, Visualization, Eye, Continuous wave operation, Safety, Laser vision correction, Tissue optics, Absorption, Laser irradiation

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Proceedings Article | 13 July 2004 Paper

Relationship between total aberrations (RMS) and pupil size in ametropic eyes with the LADARWAVE system

Ezra Maguen, Jasmine Wong, Jay Schlanger, James Salz

Proceedings Volume 5314, (2004) https://doi.org/10.1117/12.530458

KEYWORDS: Eye, Monochromatic aberrations, Wavefronts, Laser vision correction, Excimer lasers, Optical design, Ophthalmology, Clinical trials, Diagnostics, Wavefront analysis

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Proceedings Article | 13 June 2002 Paper

Update on laser vision correction using wavefront analysis with the CustomCornea system and LADARVision 193-nm excimer laser

Ezra Maguen, James Salz, Marguerite McDonald, George Pettit, Thanassis Papaioannou, Warren Grundfest

Proceedings Volume 4611, (2002) https://doi.org/10.1117/12.470588

KEYWORDS: Wavefront analysis, Eye, Laser vision correction, Excimer lasers, LASIK, Contrast sensitivity, Wavefronts, Visualization, Monochromatic aberrations, Clinical trials

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Proceedings Article | 13 June 2002 Paper

Spatiotemporal temperature profiling of corneal surface during LTK

Thanassis Papaioannou, Ezra Maguen, Warren Grundfest

Proceedings Volume 4611, (2002) https://doi.org/10.1117/12.470582

KEYWORDS: Thermal modeling, Thermography, Cameras, In vitro testing, Eye models, Cornea, Tissues, Profiling, Temporal resolution, Medical research

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Accurate prediction of LTK treatments requires refined thermal corneal models which necessitate precise input parameters. The overall objective of this study was to provide detailed information on the spatiotemporal temperature profile of the corneal surface, during in-vitro thermal keratoplasty. LTK was performed in-vitro on freshly harvested porcine eyes (N equals 16) with the Sunrise Technologies corneal shaping system (Model SUN 1000). Spatiotemporal thermal imaging of the irradiated corneas were obtained with a short wave Inframetrics thermal camera (Model PM290). Images were obtained at 8-bits resolution, with ~100 microns spatial and ~17 msec temporal resolution respectively. Treatment pattern consisted of eight spots at 6 mm zone, while lasing was conducted at settings of either 100 mJ and 15 pulses (N equals 8), or 260 mJ and 7 pulses (N equals 8). Temporal and spatial variation of the corneal surface temperatures were calculated at locations of importance to LTK. At the laser spot, temperature profiles consisted of transients coinciding approximately with the laser pulses. Maximum transient temperatures observed were 98.0+/- 4.6 degree(s)C for the high and 56.3+/- 2.6 degree(s)C for the low energy respectively. These temperature transients were superimposed on an envelope of lower-slowly varying temperatures. The maximum temperatures observed for this temperature envelope, were 51.8+/- 3.4 degree(s)C for the high and 35.4+/- 3.4 degree(s)C for the low energy respectively. The evolution of either the maximum temperature transients or the lower temperature envelope, followed exponential growth of the form: T equals A * exp(B*t). Maximum temperatures at locations 0.5 mm and 1 mm away from the laser spot, reached 25.7 degree(s)C and 23.3 degree(s)C for the low energy, and 34 degree(s)C and 25.6 degree(s)C for the high energy settings respectively. Temperature decay constants were approximately 2 to 3 sec, while the spatial temperature profile at the laser spot extended more than 2 mm at 2.5 sec post irradiation. The data obtained may help to refine corneal thermal modeling during LTK, and thus improve predictability of current or future-modified-treatments.

Proceedings Article | 7 June 2001 Paper

Patient treatment based on wavefront-guided CustomCornea correction with the Alcon Summit Autonomous LADARVision excimer laser system

Ezra Maguen, James Salz, Marguerite McDonald, George Pettit, K. Leidel, John Campin

Proceedings Volume 4245, (2001) https://doi.org/10.1117/12.429260

KEYWORDS: LASIK, Excimer lasers, Visualization, Eye, Monochromatic aberrations, Wavefront analysis, Wavefronts, Laser systems engineering, Laser vision correction, Surgery

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Proceedings Article | 7 June 2000 Paper

Preliminary results of tracked laser-assisted in-situ keratomileusis (T-LASIK) for myopia and hyperopia using the autonomous technologies excimer laser system

Ezra Maguen, Anthony Nesburn, James Salz

Proceedings Volume 3908, (2000) https://doi.org/10.1117/12.387521

KEYWORDS: Laser vision correction, Monochromatic aberrations, Excimer lasers, Eye, LASIK, Visualization, Laser applications, Spherical lenses, Laser safety, Laser systems engineering

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Proceedings Article | 18 June 1999 Paper

One-year results of hyperopic photorefractive keratectomy (HPRK) at Cedars-Sinai Medical Center

Ezra Maguen, Anthony Nesburn, James Salz

Proceedings Volume 3591, (1999) https://doi.org/10.1117/12.350563

KEYWORDS: Visualization, Eye, Cornea, Excimer lasers, Monochromatic aberrations, Chlorine, Medicine, Spherical lenses, Refraction, Ophthalmology

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Proceedings Article | 1 June 1998 Paper

Preliminary results of hyperopic photorefractive keratectomy (HPRK) at Cedars-Sinai Medical Center

Ezra Maguen, Anthony Nesburn, James Salz

Proceedings Volume 3246, (1998) https://doi.org/10.1117/12.309453

KEYWORDS: Eye, Monochromatic aberrations, Excimer lasers, Cornea, Visualization, Refraction, Medicine, Medical research, Stars, Beam delivery

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Proceedings Article | 26 May 1997 Paper

Preliminary results of tracked photorefractive keratectomy (T-PRK) for mild to moderate myopia with the autonomous technologies excimer laser at Cedars-Sinai Medical Center

Ezra Maguen, James Salz, Anthony Nesburn

Proceedings Volume 2971, (1997) https://doi.org/10.1117/12.275098

KEYWORDS: Eye, Visualization, Excimer lasers, Monochromatic aberrations, Laser applications, Safety, Spherical lenses, Refraction, Argon ion lasers, Laser vision correction

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Proceedings Article | 17 May 1996 Paper

Factors affecting the outcome of excimer laser photorefractive keratectomy: a preliminary multivariable regression analysis

Ezra Maguen, Thanassis Papaioannou, Anthony Nesburn, James Salz, Cathy Warren, Warren Grundfest

Proceedings Volume 2673, (1996) https://doi.org/10.1117/12.240063

KEYWORDS: Excimer lasers, Eye models, Statistical analysis, Analytical research, Medical research, Laser applications, Refraction, Surgery, Ophthalmology, Laser vision correction

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Proceedings Article | 22 May 1995 Paper

Evaluation of some technical factors affecting surgical outcome in photorefractive keratectomy with the VISX 2020 excimer laser

Ezra Maguen, James Salz, Thanassis Papaioannou, Anthony Nesburn

Proceedings Volume 2393, (1995) https://doi.org/10.1117/12.209858

KEYWORDS: Nitrogen, Excimer lasers, Visualization, Refraction, Laser ablation, Visual optics, Spherical lenses, Air contamination, Surgery, Medical research

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Proceedings Article | 23 June 1994 Paper

Results of excimer laser photorefractive keratectomy for the correction of myopia at Cedars-Sinai Medical Center: 1993

Ezra Maguen, James Salz, Anthony Nesburn, Cathy Warren, Jonathan Macy, Thanassis Papaioannou, John Hofbauer, Michael Berlin

Proceedings Volume 2126, (1994) https://doi.org/10.1117/12.178541

KEYWORDS: Nitrogen, Visualization, Refraction, Excimer lasers, Monochromatic aberrations, Spherical lenses, Eye, Cornea, Optical calibration, Air contamination

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Proceedings Article | 24 June 1993 Paper

Update on excimer laser photorefractive keratectomy (PRK) at Cedars-Sinai Medical Center: two-year experience

Ezra Maguen, James Salz, Cathy Warren, Thanassis Papaioannou, Anthony Nesburn, Jonathan Macy, John Hofbauer, Warren Grundfest

Proceedings Volume 1877, (1993) https://doi.org/10.1117/12.147512

KEYWORDS: Visualization, Nitrogen, Excimer lasers, Eye, Laser ablation, Monochromatic aberrations, Air contamination, Cornea, Spherical lenses, Safety

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Proceedings Article | 14 August 1992 Paper

Preliminary results of VISX excimer laser myopic photorefractive keratectomy at Cedars-Sinai Medical Center

Ezra Maguen, Michael Berlin, John Hofbauer, Jonathan Macy, Anthony Nesburn, Thanassis Papaioannou, James Salz

Proceedings Volume 1644, (1992) https://doi.org/10.1117/12.142542

KEYWORDS: Monochromatic aberrations, Visualization, Excimer lasers, Surgery, Cornea, Optical calibration, Laser vision correction, Laser ablation, Eye, Spherical lenses

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Showing 5 of 14 publications

Conference Committee Involvement (23)

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

Showing 5 of 23 Conference Committees

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