Chi N. Quang, O.D.

Dr. Quang purchased Castro Valley Optometry Group in 2010.  She is certified to provide full-scope optometric eye care, including the treatment of glaucoma.  Dr. Quang is dedicated to giving her patients thorough and personalized eye exams, with special interests in low vision and specialty contact lens fittings.

Dr. Quang graduated from the University of California Berkeley, earning a Bachelor of Science degree in Molecular Cell Biology (with a Neurobiology emphasis) in 2001, and a Doctor of Optometry degree in 2009. Following graduation, she completed a Primary Care and Low Vision Rehabilitation Residency at the Palo Alto Veterans Affairs Medical Center.  She continues to share her time between the Veterans hospital and Castro Valley Optometry Group practice.

Dr. Quang speaks Cantonese, Vietnamese, and Spanish.  Her interests include sewing, painting, and enjoying the outdoors.


Glen Y. Ozawa, O.D.

Dr. Ozawa graduated from the University of California Berkeley School of Optometry in 2001. He completed a residency in ocular disease in the following year, and he has been seeing patients in private practice since 2002.

Dr. Ozawa is also an Associate Clinical Professor at UC Berkeley, teaching in the classroom and seeing patients with interns at the Eastmont Wellness Center. In 2015, the California Optometric Association recognized Dr. Ozawa with an award for Excellence in Teaching. He has also received the Michael G. Harris Teaching Award from the graduating classes of 2014 and 2015 and the Roy Brandreth Award in 2017.

When Dr. Ozawa is not teaching, he is involved in diabetes research. He has published a number of studies in various peer-reviewed journals regarding screening for diabetic retinopathy and electrophysiological changes in the eye that are associated with diabetes.

In his free time, Dr. Ozawa enjoys camping and fly fishing.


Paul H. Peng, O.D., M.A.

Dr. Peng graduated from the University of California Berkeley with a Doctor of Optometry degree in 1986 and a Masters of Art degree in reading disabilities in 1987.  He completed his certification for glaucoma treatment in 2002. 

Dr. Peng is a Fellow of the American Academy of Optometry and a past president of the Alumni Association at Berkeley Optometry.  Currently, he divides his time between Cal Optometry and Kaiser.  At Castro Valley Optometry Group, Dr. Peng is available by limited appointments only, and does not accept new patients.

When he’s not at work, Dr. Peng likes to spend time with his family and to scuba-dive.