Our Doctors are Dedicated to Improving Your Vision
The eye doctors at Colorado Ophthalmology Associates are among the most respected in the Denver area. They are dedicated to informing you about procedures, providing personalized treatment and taking the time to ensure that your visit is as comfortable as possible.
J. Timothy Ammons, MD
Dr. Ammons has been performing cataract refractive surgery since 1992 and laser refractive surgery since 1996, when the first FDA approved excimer laser arrived in Denver. He is dedicated to personally caring for patients throughout the preoperative, surgical and postoperative experience, believing that personalized care leads to optimal outcomes. Dr. Ammons also has an active cataract, glaucoma, and general ophthalmology practice.
Dr. Ammons grew up in Denver’s Park Hill neighborhood. He attended Dartmouth College in New Hampshire, graduating Phi Beta Kappa, Magna Cum Laud in 1979. After college, he married and took his wife Mary, also from Denver, to England. As a Marshall scholar, he earned his Masters degree at Oxford University. He and Mary returned to Denver, where Dr. Ammons attended the University of Colorado School of Medicine and continued with his residency in Ophthalmology at University of Colorado Health Sciences Center.
Dr. Ammons joined Colorado Ophthalmology Associates in 1993. He is a board certified member of the American Academy of Ophthalmology and a past president of the Colorado Society of Eye Physicians and Surgeons. Appointed by the Governor, he served four years as a member of the Colorado Board of Medical Examiners, chairing panel A, before returning to dedicate full time to his ophthalmology practice.
The Ammons still enjoy spending time with their 5 children, ages 19-31. Dr. Ammons enjoys trying to keep up with them skiing, mountain bicycling, climbing and whitewater kayaking.
Jason M. Jacobs, M.D.
Jason M. Jacobs, M.D. treats Colorado Ophthalmology Associates patients at our Denver offices. Dr. Jacobs is an accomplished cataract and refractive surgeon. He also provides excellent care in diabetic eye treatment, glaucoma, and all areas of general ophthalmology. He dedicates himself to providing compassionate, personalized care that integrates each patient’s eye care into his or her complete health care needs and overall life. Dr. Jacobs grew up in New York. He attended Harvard University in Boston, MA, and graduated first in his class of 1993 Phi Beta Kappa with a degree Summa Cum Laude in Physics with a special interest in optics. In 1997 he received his M.D. from the Duke University School of Medicine in North Carolina, where he also received the high honor of Alpha Omega Alpha membership. He performed his internship in transitional medicine at HealthONE-Presbyterian/St. Luke’s Medical Center, and his residency in ophthalmology at the University of Colorado Health Sciences Center.
During his education, Dr. Jacobs conducted research on the excimer laser at the IBM Thomas J. Watson Research Center, which is the laboratory credited with developing the excimer and femtosecond laser technology used in laser refractive eye surgery. He holds several patents on excimer laser procedures.
Dr. Jacobs has been in private practice in Denver since 2001. 5280 Magazine named him one of Denver’s “Top Docs” in Ophthalmology in every year 2006-2013, and again 2015-2017. He is Specialty Board Certified and is a Diplomate of the American Board of Ophthalmology. Dr. Jacobs also serves as a Clinical Instructor on the faculty of the Transitional Internship Program at HealthONE-Presbyterian/St. Luke’s Medical Center.
Dr. Jacobs lives in Arapahoe County with his wife, Victoria, and their four children. In addition to his professional life, he enjoys spending time with family, supporting his children’s educations, bicycling, reading, and serving his local Council of the Knights of Columbus.
Amy Kelmenson, M.D.
Amy Kelmenson, MD is a Corneal, Refractive and External Disease Specialist. Dr. Kelmenson joined Colorado Ophthalmology Associates in 2012 and performs surgeries such as cataract surgery, full thickness corneal transplant (penetrating keratoplasty), partial thickness corneal transplant (DSAEK), and refractive surgery such as Lasik. She has received specialized training in corneal and ocular surface disease and surgeries, but also treats patients in all aspects of general ophthalmology including routine eye care, dry eye and allergic eye diseases, cataracts, glaucoma, diabetic eye disease, and uveitis. She believes in compassionate personalized care and a hands on approach to treating her patients. She treats Colorado Ophthalmology patients at both our Denver and Lakewood locations and speaks both English and Spanish.
Dr. Kelmenson is a Denver native and graduated from Cherry Creek High School. She received her undergraduate degree from the University of Rochester, NY with degrees in both Biology and Spanish. She then completed medical school at the University of Colorado Health Sciences Center in 2007. After completing her medical internship in Internal Medicine at the University of Colorado, she went to Florida for her residency in Ophthalmology at the University of Florida in Jacksonville where she served as chief resident. She then went to Tufts New England Eye Center/Ophthalmic Consultants of Boston for her corneal fellowship, where she specialized in cornea, anterior segment, and refractive surgery.
Dr. Kelmenson is a board certified fellow with the American Board of Ophthalmology. She is also a member of the Colorado Society for Eye Physicians and Surgeons, the American Academy of Ophthalmology, and the American Society of Cataract and Refractive Surgeons. She has published several text book chapters in the areas of Allergic Eye Disease and Corneal Dystrophies, in addition to publishing multiple publications in peer reviewed ophthalmology journals. She also acts as a clinical instructor for interns at both Presbyterian/St. Luke’s hospital and St. Joseph’s hospital here in Denver. She was also one of the official ophthalmologists for the Denver Nuggets from 2012-2017.
Outside of her rewarding profession, Dr. Kelmenson enjoys skiing, hiking, biking, and traveling.
Richard Kelmenson, M.D
Richard Kelmenson, M.D. Provides care for Colorado Ophthalmology Associates patients at both of our Denver and Lakewood offices. He is the son of a general surgeon and has two daughters, one of which is a Corneal, Refractive and External Disease Specialist also with Colorado Ophthalmology Associates.
Dr. Kelmenson grew up in Maryland and received his undergraduate degree from the University of Pennsylvania in Environmental Biology graduating cum laude, He completed medical school at the university of Maryland School of Medicine in 1977 and continued with a pediatric internship at the University of Maryland Hospital. He than came to Colorado for his residency training in ophthalmology at the University of Colorado Health Sciences Center.
On completion of his residency, he founded Colorado Eye Care and was in ophthalmology private practice there for 33 years. Dr. Kelmenson joined Colorado Ophthalmology Associates in February of 2014 and specializes in General Ophthalmology. He also provides consultative services for patients at Craig Rehabilitation Hospital.
Dr. Kelmenson is a board certified fellow of the American Board of Ophthalmology and a member of the Colorado Society of Eye Physicians and Surgeons. He has been an Assistant Clinical Professor of Ophthalmology at the University of Colorado since 1983 and is a Physician Reviewer for United HealthCare Quality Control and Peer Review Committees since 1998. He was an official ophthalmologist for the Denver Nuggets from 2004 to 2017. He also worked as a volunteer physician for The Colorado Coalition for the Homeless for 8 years and has worked with several medical missions trips in Mexico and Honduras.
Outside of his rewarding profession, Dr. Klemenson enjoys biking, skiing, outdoor activities and traveling.
Robert Keyser, MD
Robert Keyser, MD treats Colorado Ophthalmology Associates patients at both our Denver and Lakewood offices. Dr. Keyser currently lives in Denver with his wife Yvette. He has three grown children, Rob, Scott, and Jennifer and two grandchildren, Ben and Emma.
Dr. Keyser graduated from high school in Kalamazoo, Michigan. He attended undergraduate studies at Kalamazoo College, graduating in 1964. He completed medical school at the University of Michigan in 1968. Following medical school, he did a rotating internship at the University of Washington, Harborview Hospital.
After two-and-a-half years of service in the U.S. Navy as a flight surgeon, he moved to Colorado where he completed his residency in ophthalmology at the University of Colorado Health Sciences Center. Dr. Keyser was Head fellow and trained in ophthalmic pathology from 1975 to 1976 at the CU Health Sciences Center. Dr. Keyser joined Colorado Ophthalmology Associates the following year. He excels in refractive surgery, cataract surgery, glaucoma surgery, and retinal laser surgery. He has been board certified by the American Board of Ophthalmology since 1976 and is a Clinical Professor of Ophthalmology at the University of Colorado Health Sciences Center, where he teaches residents on a weekly basis.
Dr. Keyser is a member and past president of the Colorado Society of Eye Physicians and Surgeons, a fellow in the American Academy of Ophthalmology, and a member of the Denver Medical Society.
Dr. Keyser has been performing cataract refractive eye surgery since 1974 and started performing PRK and LASIK eye surgery in 1996, when the procedures were first approved in the United States. He was one of the founding physicians of the Clear Vision Laser Centers in the Denver metropolitan area.
Outside of his rewarding profession as an eye doctor, Dr. Keyser enjoys golf, travel, and biking.
James Patterson, MD
James Patterson, MD treats Colorado Ophthalmology Associates patients at both of our Denver and Lakewood offices. Dr. Patterson is a Denver native, and the son of a former Denver urologist. He has two sons, Colin and Cameron.
Dr. Patterson graduated from Cherry Creek High School, and spent one year living in Norway as an American Field Service foreign exchange student. He received his undergraduate degree from Brown University in 1976, and then completed medical school at the University of Colorado in 1981. After serving his medical internship year in Christchurch, New Zealand, he returned to the University of Colorado for his residency in ophthalmology.
Since finishing his residency, Dr. Patterson has been in practice with Colorado Ophthalmology Associates, excelling in eye surgeries such as; refractive surgery, cataract surgery, and glaucoma surgery. Dr. Patterson has been performing refractive surgery since 1987, and started performing PRK and LASIK surgery in 1996, when they were first approved in the United States. He is board certified by the American Board of Ophthalmology and is an Assistant Clinical Professor of Ophthalmology at the University of Colorado.
Dr. Patterson was one of the founding physicians of the Clear Vision Laser Centers in the Denver metropolitan area. He is also a member and past president of the Colorado Society of Eye Physicians and Surgeons and is a fellow in the American Academy of Ophthalmology and the American College of Surgeons. In the past several years, he has partnered with the Centura Global Health Initiatives to provide cataract surgery to needy patients in the Amazon Basin in Peru.
Outside of his rewarding profession as an eye doctor, Dr. Patterson enjoys skiing, sailing, hiking, and bicycling.
James Melzer, OD
James Melzer, OD treats Colorado Ophthalmology Associates patients at both our Denver and Lakewood offices. Dr. Melzer is a second-generation Colorado native. After completing his undergraduate studies at Colorado State University, he pursued graduate studies at the University of North Dakota and Washington State University. Following three years of post-doctoral research on the effects of radiation on genetic material, Dr. Melzer moved his family to Buffalo, New York to teach biology and genetics at Canisius College. After five years of teaching, Dr. Melzer returned to school at the Michigan College of Optometry, where he graduated as valedictorian in 1999.
Dr. Melzer joined Colorado Ophthalmology Associates in 1999. He specializes in contact lens fitting as well as primary eye care. Specialty contact lens fitting for people with keratoconus (irregular corneas) or post-surgery defects is one of Dr. Melzer’s favorite and most rewarding jobs. In addition to this, Dr. Melzer works extensively with patients who suffer from dry eye syndrome.
Dr. Melzer lives in Littleton with his wife and two children, and is very glad to be back in Colorado. In his free time, he enjoys hiking, skiing, biking, and gardening.
Stephanie Melzer, O.D.
Stephanie Melzer, O.D. treats Colorado Ophthalmology Associates patients at both the Denver and Lakewood offices. She provides excellent primary eye care, including contact lens fittings and the general management of ocular diseases like macular degeneration and glaucoma.
Dr. Melzer grew up in Littleton, CO. After graduating from Columbine High School she attended Colorado State University where she earned degrees in International Studies and Spanish. She then completed optometry school in Forest Grove, Oregon, graduating with honors from Pacific University in 2015. Dr. Melzer preformed internships at a refractive surgery center in Denver, CO, a private ophthalmology practice in Fairfield, CT, as well as the Veteran’s Affair Medical Center in Lexington, KY and the Indian Health Service in Santa Fe, NM.
Dr. Melzer has traveled to Haiti and El Salvador to provide eye care to underserved populations, and most recently, has worked with Children without Borders and VOSH international to provide eye exams to children in Costa Rica. She also completed a student fellowship through the American Academy of Optometry.
In her free time, she enjoys traveling, backpacking, and cycling, as well as sampling the many restaurants in the Denver area. She also looks forward to spending time with family!