Dr. Brian J. Lund Profile

Dr. Brian J. Lund

at SAIC

SPIE Involvement:

Author

Proceedings Article | 13 March 2024 Presentation

Retinal dose response from exposure to the supercontinuum generated by a NIR femtosecond laser

Xomalin Peralta, Joseph Clary, Amanda Peterson, Matthew Macasadia, Maximillian Hart, Amanda Tijerina, Gary Noojin, Brian Lund, Semih Kumru, Francesco Echeverria

Proceedings Volume PC12840, PC128400D (2024) https://doi.org/10.1117/12.3001521

KEYWORDS: Supercontinuum generation, Femtosecond phenomena, Near infrared, Femtosecond pulse shaping, Eye, Standards development, Laser safety, Ultrafast phenomena, Pulsed laser operation, Laser vision correction

Read Abstract +

Proceedings Article | 7 March 2023 Presentation + Paper

Evaluating the retinal hazard from exposures to the supercontinuum generated by a NIR femtosecond laser

Xomalin Peralta, Joseph Clary, Amanda Peterson, Amanda Tijerina, Matthew Macasadia, Gary Noojin, Brian Lund, Semih Kumru, Benjamin Rockwell, Francesco Echeverria

Proceedings Volume 12377, 1237704 (2023) https://doi.org/10.1117/12.2646262

KEYWORDS: Near infrared, Eye, Retina, Femtosecond phenomena, Femtosecond pulse shaping, Collimation, Ultrafast phenomena, Laser safety, Standards development, Cameras

Read Abstract +

Proceedings Article | 2 March 2022 Paper

Femtosecond laser corneal damage thresholds at 1540 nm and 2000 nm

Xomalin Peralta, Joseph Clary, Amanda Peterson, Michelle Jefferson, Amanda Tijerina, Brian Lund, Wesley Kinerk, Francesco Echeverria, Benjamin Rockwell

Proceedings Volume 11958, 1195807 (2022) https://doi.org/10.1117/12.2608295

KEYWORDS: Cornea, Femtosecond phenomena, Near infrared, Laser damage threshold, Standards development, Laser safety, Optical coherence tomography, Eye, Safety

Read Abstract +

Proceedings Article | 5 March 2021 Presentation + Paper

Evaluating the potential eye hazard at visible wavelengths of the supercontinuum generated by a NIR femtosecond laser in water

Xomalin Peralta, Joseph Clary, Amanda Peterson, Gary Noojin, Brian Lund, Francesco Echeverria, Benjamin Rockwell

Proceedings Volume 11640, 1164004 (2021) https://doi.org/10.1117/12.2576781

KEYWORDS: Eye, Near infrared, Femtosecond phenomena, Visible radiation, Standards development, Pulsed laser operation, Laser vision correction, Laser safety, Laser applications, Ultrafast phenomena

Read Abstract +

Proceedings Article | 20 February 2020 Paper

Visualizing retinal hemorrhage thresholds for Q-switched Nd:YAG lasers in a novel porcine model

Morgan Schmidt, Heuy-Ching Wang, Gary Noojin, William Elliot, Peter Edsall, Brian Lund, Aurora Shingledecker, Amanda Tijerina, Kurt Schuster, Benjamin Rockwell

Proceedings Volume 11238, 112380U (2020) https://doi.org/10.1117/12.2543413

KEYWORDS: Nd:YAG lasers, Visualization, Laser damage threshold, Eye, Retina, Data modeling, Q switched lasers, Laser applications, Visual process modeling, Optical coherence tomography

Read Abstract +

SPIE Journal Paper | 7 October 2014 Open Access

Laser-induced retinal damage threshold for repetitive-pulse exposure to 100-μs pulses

Brian Lund, David Lund, Peter Edsall, Victor Gaines

JBO, Vol. 19, Issue 10, 105006, (October 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.10.105006

KEYWORDS: Injuries, Thermal modeling, Laser damage threshold, Collimation, Data modeling, Eye, Pulsed laser operation, Laser induced damage, Laser safety, Picosecond phenomena

Read Abstract +

DOWNLOAD PAPER

SPIE Journal Paper | 1 November 2008 Open Access

Laser-induced retinal damage threshold measurements with wavefront correction

Brian Lund, David Lund, Peter Edsall

JBO, Vol. 13, Issue 06, 064011, (November 2008) https://doi.org/10.1117/12.10.1117/1.3013455

KEYWORDS: Wavefronts, Eye, Adaptive optics, Retina, In vivo imaging, Laser damage threshold, Colorimetry, Laser induced damage, In vitro testing, Telescopes

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 26 March 2007 Paper

Laser-induced retinal injury studies with wavefront correction

Brian Lund, David Lund, Peter Edsall

Proceedings Volume 6426, 642627 (2007) https://doi.org/10.1117/12.710993

KEYWORDS: Wavefronts, Eye, Retina, Injuries, Adaptive optics, Mirrors, Telescopes, Cameras, Cornea, Deformable mirrors

Read Abstract +

SPIE Journal Paper | 1 November 2006 Open Access

Laser retinal thermal damage threshold: impact of small-scale ocular motion

Brian Lund

JBO, Vol. 11, Issue 06, 064033, (November 2006) https://doi.org/10.1117/12.10.1117/1.2393091

KEYWORDS: Eye, Laser damage threshold, Retina, Eye models, Laser induced damage, Helium neon lasers, Motion estimation, Continuous wave operation, Laser safety, Thermal effects

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 18 April 2005 Paper

Contribution of eye movements to thermal damage thresholds for long-duration laser exposures

Brian Lund

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.598207

KEYWORDS: Eye, Laser damage threshold, Retina, Thermal modeling, Eye models, Continuous wave operation, Receivers, Software, Head, Medical research

Read Abstract +

SPIE Journal Paper | 1 September 2004 Open Access

Computer model to investigate the effect of eye movements on retinal heating during long-duration fixation on a laser source

Brian Lund

JBO, Vol. 9, Issue 05, (September 2004) https://doi.org/10.1117/12.10.1117/1.1783355

KEYWORDS: Eye, Retina, Eye models, Absorption, Computer simulations, Optical simulations, Continuous wave operation, Laser sources, Helium neon lasers, Thermal modeling

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 June 2003 Paper

Human color vision deficits induced by accidental laser exposure and potential for long-term recovery

Harry Zwick, Brian Lund, Jeremiah Brown, Bruce Stuck, J. Loveday

Proceedings Volume 4953, (2003) https://doi.org/10.1117/12.488645

KEYWORDS: Cones, Visualization, Color vision, Roentgenium, Retina, Injuries, Colorimetry, Fermium, Frequency modulation, Vitreous

Read Abstract +

Purpose: To evaluate long term deficits in human color discrimination induced by accidental laser macular damage and assess potential for recovery of color vision deficits. Methods: Nine laser accident cases (Q-switched Neodymium) presenting initially with confined or vitreous macular hemorrhage were evaluated with the Farnsworth-Munsell 100 Hue test within 2 days to 3 months post exposure. Both total as well as partial errors in the blue/yellow (B/Y) and red/green (R/G) regions were assessed. Independent assessment of axis orientation and complexity were obtained via a Fourier series expansion of error scores. Comparisons of both total and partial B/Y and R/G errors were made with age matched normal subjects, idiopathic and juvenile onset macular holes. Confocal Scanning Laser Ophthalmoscopy and Optical Coherence Tomography characterized the presence of retinal traction, intraretinal scar, macular thickness and macular hole formation. Results: Comparison of exposed and non-exposed age matched individuals were significant (P<.001) for both total and partial errors. In four cases where macular injury ranged from mild scar to macular hole, color discrimination errors achieved normal levels in 1 to 12 months post exposure. A mild tritan axis, dominant B/Y ("blue/yellow") errors, and retinal traction were observed in a macular hole case. At 12 months post exposure, traction about the hole disappeared, and total and partial errors were normal. Where damage involved a greater degree of scarring, retinal traction and multiple injury sites, long term recovery of total and partial error recovery was retarded with complex axis makeup. Single exposures in the paramacula produced tritan axes, while multiple exposures within and external to the macula increased total and partial R/G ("red/green") error scores. Total errors increased when paramacular hole enlargement induced macular traction. Such hole formation produced significant increases in total errors, complex axis formation and increased amplitude in higher Fourier error expansion components. Conclusion: Color discrimination losses reflect the distribution of different cone systems in and about the macula and their selective loss. When secondary damage is minimal, color discrimination deficits recover within 12 months post exposure. When macular scarring and retinal traction are severe, recovery is significantly retarded. Laser induced macular holes may affect color discrimination less when retinal scar and traction are small but may become equivalent with that of idiopathic and juvenile species when scar and traction are severe.