Geunyoung Yoon, Ph.D.

Contact Information

Phone Numbers

Appointment: (585) 276-3000

Research Labs

Advanced Physiological Optics Lab

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Yoon Lab

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Locations

University of Rochester Medical Center
School of Medicine and Dentistry
601 Elmwood Ave, Box 659
Rochester, NY 14642

Faculty Appointments

Professor - Department of Ophthalmology (SMD)
Professor - Department of Biomedical Engineering (SMD) - Joint
Professor - Department of The Institute for Optics (RC) - Joint
Professor - Department of Center for Visual Science A&S (RC) - Joint

Biography

Research

Research projects in the Advanced Physiological Optics Laboratory have been focusing on optics of the eye. The goals of the projects are to objectively understand optical quality of the eye and to improve visual performance by correcting the optical defects in the eye with various correction methods. We have successfully developed the large dynamic range wavefront sensor with high measurement sensitivity that allows us to measure highly aberrated eyes such as advanced keratoconus. We have also developed the customized correction methods. These include customized optical components such as phase plate and soft contact lenses, and laser refractive surgery. We recently implemented the large stroke adaptive optics system for vision testing that has sufficient deformable mirror stroke to correct the highly aberrated eyes such as advanced keratoconus. This powerful tool is being used to understand interaction between optics of the eye and adaptation effects of the human visual system. We are currently expanding our research scope to presbyopia, accommodation and dry eye with advanced intraocular imaging system such as Fourier domain optical coherence tomography and high-resolution magnetic resonance imaging. We have also been very active in collaborating with PIs in intramural and extramural research laboratories and industry.

Credentials

Education

1990
BS | Korea - Non-Medical School
Physics

1995
MS | Japan-Osaka U Fac Med
Laser Optics

1998
PhD | Japan-Osaka U Fac Med
Laser Optics

Patents

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: HK1082168
Issue Date: May 04, 2007
Country: Hong Kong
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: HK1082169
Issue Date: May 04, 2007
Country: Hong Kong
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: 1561416
Issue Date: Dec 27, 2006
Country: Europe
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: DE1561416
Issue Date: Dec 27, 2006
Country: Germany
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: ES1561416
Issue Date: Dec 27, 2006
Country: Spain
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: GB1561416
Issue Date: Dec 27, 2006
Country: United Kingdom
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: IT1561416
Issue Date: Dec 27, 2006
Country: Italy
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: FR1561416
Issue Date: Dec 27, 2006
Country: France
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: 1561417
Issue Date: Dec 20, 2006
Country: Europe
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: DE1561417
Issue Date: Dec 20, 2006
Country: Germany
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: FR1561417
Issue Date: Dec 20, 2006
Country: France
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: IT1561417
Issue Date: Dec 20, 2006
Country: Italy
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: ES1561417
Issue Date: Dec 20, 2006
Country: Spain
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: GB1561417
Issue Date: Dec 20, 2006
Country: United Kingdom
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: DE1235508
Issue Date: Aug 09, 2006
Country: Germany
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: FR1235508
Issue Date: Aug 09, 2006
Country: France
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: ES1235508
Issue Date: Aug 09, 2006
Country: Spain
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: GB1235508
Issue Date: Aug 09, 2006
Country: United Kingdom
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor with Off-Axis Illumination
Patent #: IT1235508
Issue Date: Aug 09, 2006
Country: Italy
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 4656791
Issue Date: Jan 07, 2011
Country: Japan
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: PI0014924-1
Issue Date: Feb 25, 2009
Country: Brazil
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 2,388,775
Issue Date: Sep 18, 2007
Country: Canada
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 07 34515
Issue Date: Jun 26, 2007
Country: Korea, Republic of
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 1235508
Issue Date: Aug 09, 2006
Country: Europe
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 88416
Issue Date: Jan 27, 2006
Country: Singapore
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: ZL 00814577.6
Issue Date: Sep 28, 2005
Country: China, People's Republic of
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 781573
Issue Date: Sep 15, 2005
Country: Australia
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis Illumination
Patent #: 6,264,328
Issue Date: Jul 24, 2001
Country: United States
Invented By: David R Williams, Geunyoung Yoon

Patent Title: Wavefront Sensor With Off-Axis
Patent #: HK 1049435
Issue Date: Jan 05, 2007
Country: Hong Kong
Invented By: David R Williams, Geunyoung Yoon

Patent Title: System and Method for Designing Wavefront-Guided Ophthalmic Lenses
Patent #: 9,925,038
Issue Date: Mar 27, 2018
Country: United States
Invented By: Geunyoung Yoon

Patent Title: Scanning Optical System For a Large Axial Scan Depth Anterior Segment Optical Coherence Tomography (OCT)
Patent #: 8,608,314
Issue Date: Dec 17, 2013
Country: United States
Invented By: Rahul Yadav, Geunyoung Yoon

Patent Title: Rapid, Automatic Measurement of the Eye's Wave Aberration
Patent #: 4660047
Issue Date: Jan 07, 2011
Country: Japan
Invented By: Juan L Aragon, Pablo Artal, Heidi Hofer, Pedro M Prieto, Benjamin Singer, Fernando Vargas, William J Vaughn III, David R Williams, Geunyoung Yoon

Patent Title: Rapid, Automatic Measurement of the Eye's Wave Aberration
Patent #: 6,199,986
Issue Date: Mar 13, 2001
Country: United States
Invented By: Juan L Aragon, Pablo Artal, Heidi Hofer, Pedro M Prieto, Benjamin Singer, Fernando Vargas, William J Vaughn III, David R Williams, Geunyoung Yoon

Patent Title: Measuring the Ocular Point Spread Function Using Adaptive Optics
Patent #: 8,616,703
Issue Date: Dec 31, 2013
Country: United States
Invented By: Ramkumar Sabesan, Geunyoung Yoon

Patent Title: Large Dynamic Range Shack-Hartmann Wavefront Sensor
Patent #: 7,414,712
Issue Date: Aug 19, 2008
Country: United States
Invented By: Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: 2407082
Issue Date: Mar 30, 2010
Country: Canada
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: 4289814
Issue Date: Apr 10, 2009
Country: Japan
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: 260244
Issue Date: Sep 03, 2008
Country: Mexico
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: 0841658
Issue Date: Jun 20, 2008
Country: Korea, Republic of
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: ZL 01808692.6
Issue Date: Aug 02, 2006
Country: China, People's Republic of
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: 2001257042
Issue Date: Sep 01, 2005
Country: Australia
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Improving Vision and Retinal Imaging
Patent #: P-91439
Issue Date: Nov 30, 2004
Country: Singapore
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Customized Wavefront-Guided Methods, Systems, and Devices to Correct Higher-Order Abberations
Patent #: 9,554,889
Issue Date: Jan 31, 2017
Country: United States
Invented By: Deborah Jacobs, Lynette K Johns, Olga Tomashevskaya, Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: 1619999
Issue Date: Jul 18, 2012
Country: Europe
Invented By: Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: DE1619999
Issue Date: Jul 18, 2012
Country: Germany
Invented By: Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: CH1619999
Issue Date: Jul 18, 2012
Country: Switzerland/Liechtenstein
Invented By: Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: GB1619999
Issue Date: Jul 18, 2012
Country: United Kingdom
Invented By: Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: 7,044,603
Issue Date: May 16, 2006
Country: United States
Invented By: Geunyoung Yoon

Patent Title: Compact Portable Wavefront Sensor
Patent #: 6,988,801
Issue Date: Jan 24, 2006
Country: United States
Invented By: Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: 5227324
Issue Date: Mar 22, 2013
Country: Japan
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: 2066226
Issue Date: Dec 19, 2012
Country: Europe
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: FR2066226
Issue Date: Dec 19, 2012
Country: France
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: DE2066226
Issue Date: Dec 19, 2012
Country: Germany
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: IT2066226
Issue Date: Dec 19, 2012
Country: Italy
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: SE2066226
Issue Date: Dec 19, 2012
Country: Sweden
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: CH2066226
Issue Date: Dec 19, 2012
Country: Switzerland/Liechtenstein
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: GB2066226
Issue Date: Dec 19, 2012
Country: United Kingdom
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Compact Ocular Fundus Camera
Patent #: 7,802,884
Issue Date: Sep 28, 2010
Country: United States
Invented By: Steven E Feldon, Geunyoung Yoon

Patent Title: Apparatus and Method for Improving Vision and Retinal Imaging
Patent #: 164094
Issue Date: Feb 18, 2003
Country: Taiwan
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

Patent Title: Apparatus and Method for Improving Vision and Retinal Imaging
Patent #: 6,338,559
Issue Date: Jan 15, 2002
Country: United States
Invented By: Antonio Guirao, David R Williams, Geunyoung Yoon

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Publications

Journal Articles

1/2016
Abreau K, Callan C, Kottaiyan R, Zhang A, Yoon G, Aquavella JV, Zavislan J, Hindman HB. "Temperatures of the Ocular Surface, Lid, and Periorbital Regions of Sjögren's, Evaporative, and Aqueous-Deficient Dry Eyes Relative to Normals." The ocular surface.. 2016 Jan 0; 14(1):64-73. Epub 2015 Oct 23.

2016
Zheleznyak L, Barbot A, Ghosh A, Yoon G. "Optical and neural anisotropy in peripheral vision." Journal of vision.. 2016 16(5):1.

10/2015
Kim MJ, Yoo YS, Joo CK, Yoon G. "Evaluation of optical performance of 4 aspheric toric intraocular lenses using an optical bench system: Influence of pupil size, decentration, and rotation." Journal of cataract and refractive surgery.. 2015 Oct 0; 41(10):2274-82.

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