Geunyoung Yoon, Ph.D.

Geunyoung Yoon, Ph.D.

Contact Information

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

Lab Information

Advanced Physiological Optics Lab

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Yoon Lab

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Research Bio

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.

Recent Journal Articles

Showing the 5 most recent journal articles. 36 available »

2014 Jan
Zheleznyak L, Jung H, Yoon G. "Impact of pupil transmission apodization on presbyopic through-focus visual performance with spherical aberration." Investigative ophthalmology & visual science. 2014 Jan; 55(1):70-7. Epub 2014 Jan 03.
2013 May
Zheleznyak L, Sabesan R, Oh JS, MacRae S, Yoon G. "Modified monovision with spherical aberration to improve presbyopic through-focus visual performance." Investigative ophthalmology & visual science. 2013 May; 54(5):3157-65. Epub 2013 May 03.
2013 Apr
Sabesan R, Johns L, Tomashevskaya O, Jacobs DS, Rosenthal P, Yoon G. "Wavefront-guided scleral lens prosthetic device for keratoconus." Optometry and vision science : official publication of the American Academy of Optometry. 2013 Apr; 90(4):314-23.
Hindman HB, Huxlin KR, Pantanelli SM, Callan CL, Sabesan R, Ching SS, Miller BE, Martin T, Yoon G. "Post-DSAEK optical changes: a comprehensive prospective analysis on the role of ocular wavefront aberrations, haze, and corneal thickness." Cornea. 2013 32(12):1567-77.
2012 Nov
Yadav R, Kottaiyan R, Ahmad K, Yoon G. "Epithelium and Bowman's layer thickness and light scatter in keratoconic cornea evaluated using ultrahigh resolution optical coherence tomography." Journal of biomedical optics. 2012 Nov; 17(11):116010.

Current Appointments

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


PhD | Laser Optics | Japan-Osaka U Fac Med1998
MS | Laser Optics | Japan-Osaka U Fac Med1995
BS | Physics | Korea - Non-Medical School1990