Our Team

Dr. George Mamalis grew up in Rock Springs, WY, a small town in southwestern Wyoming. He attended the University of Colorado and received his Bachelor of Arts degree in 1982, majoring on biology. He then went on to the University of California, Berkeley, where he received his Doctor of Optometry in 1986. Moving back to Colorado, he has been at Eyecare of Union Square ever since, and bought the practice in 1987. Dr. Mamalis belongs to the Colorado Optometric Association and the American Optometric Association.

Dr. Mamalis is board-certified by the American Board of Optometry. This means that he maintains the highest standard of practice. He also has to complete 100 hours of continuing education courses in each three-year certification period, more than twice the hours required by the State of Colorado! This adds up to the latest information in eye health to take better care of his patients.



Dr. Mamalis has been married to his wife, Leslie, since 1990. They live here in Lakewood with their dog and cat. They enjoy gardening, bird watching, hiking, and traveling. Dr. Mamalis is also a big football and ice hockey fan. Dr. Mamalis is a member of the Rotary Club of Golden, where he is active in numerous community service and charitable projects. He was selected Rotarian of the Year in 2001.

Dr. Michelle Koh grew up in Houston, Texas, where she was born and raised. She studied at University of Texas at Austin and obtained her bachelor of arts in Biology and English at University of St. Thomas. Dr. Koh attended optometry school at the University of Houston, receiving her Doctor of Optometry degree in 2007.

During her studies, Dr. Koh completed an external rotation at the Indian Hospital of Albuquerque, where she oversaw the care of many patients with diabetic eye disease. Upon completion of her studies, Dr. Koh maintained several state licenses as a locum tenens optometrist. She eventually relocated to Denver, Colorado and has been practicing at Eyecare of Union Square since 2024.

Dr. Koh belongs to the Colorado Optometric Association and the American Optometric Association. She volunteers her time at vision screenings around the Denver metro area and would love to support you in maintaining your optimal eye health. Dr. Koh is accepting new patients, from school age and up, and can conduct primary eye exams in Spanish.

Krysta was born and raised in Littleton, CO. She currently lives in Englewood with her husband, Jeff, and their dog, Millie. Krysta joined the practice in February 2013 and in July 2016, Krysta graduated from Metropolitan State University, earning her Bachelor’s degree in Business Management, and is now utilizing her skills as our office manager.  In her spare time, enjoys traveling, camping, paddleboarding, and spending as much time as she can with family. Krysta enjoys working at Eyecare of Union Square where she can assist in making patients look and see their best!

Tay was born and raised in Centennial, CO. She currently lives in Bailey, CO with her husband, Kyle, and their three dogs (Apollo, Spaghettio, and Quesodilla) and their two cats (Chicken Noodle Soup and Lynx). Tay joined Eyecare of Union Square in December 2024. Tay enjoys getting to know each patient individually and helping them find glasses that not only suit their needs but also their own personal style