Our East Denver-Lowry clinic has MOVED to Central Park: 3401 Quebec St., Suite 105, Denver, CO 80207

Colorado Retina Associates

The care you need, The compassion you deserve.

About Us

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Colorado Retina Associates is a thirteen physician and one optometrist, sub-specialty eye care practice providing medical and surgical care of vitreoretinal disease. Colorado Retina provides comprehensive retinal treatment for age-related macular degeneration (AMD), diabetic retinopathy, retinal vascular disease, retinal detachments, ocular tumors, uveitis/inflammatory eye disease, inherited retinal degenerations and numerous other retina conditions.

What We Treat

Retinal Conditions


Uveitis refers to a group of inflammatory and infectious diseases in and around the eye, including iritis, pars planitis, scleritis, birdshot chorioretinopathy and retinal vasculitis. Patients often have systemic autoimmune conditions that are associated with their uveitis.

Age-Related Macular Degeneration (AMD)
Age-Related Macular Degeneration (AMD)

The macula is the part of the retina responsible for our most detailed central vision and is essential for precise vision. Age-related Macular Degeneration (AMD) is the leading cause of blindness in the US today, affecting approximately 10 million people.


A Retinal Vein Occlusion (RVO) involves blockage of blood trying to leave the eye through the retinal veins, commonly occurring in persons over the age of 55 years and is usually associated with high blood pressure, high cholesterol, diabetes, and/or cigarette smoking.

Diabetic Retinopathy
Diabetic Retinopathy

Diabetes is the leading cause of preventable blindness in the US. There are many ways in which diabetes impacts the eye, including swelling of the macula (the most important, central part of the retina), decreased oxygen delivery, and new growth and bleeding of diseased blood vessels.

Epiretinal Membrane (ERM)
Epiretinal Membrane (ERM)

An ERM (also known as macular pucker) is a growth of scar tissue over the macula, the portion of the retina providing central vision. Typically due to age related eye changes, ERM development is also associated with a retinal tear and detachment, eye trauma, and diabetes.

Inherited Retinal Disease
Inherited Retinal Disease

Inherited retinal diseases (IRDs) are a group of genetic disorders that affect the retina’s ability to transmit light-related information to the brain. Typically, IRDs cause a slow loss of vision, beginning with decreased night vision and loss of peripheral (side) vision.

Macular Hole
Macular Hole

The macula is the part of the retina responsible for our most detailed central vision and is essential for precise visual activities like reading and driving. A macular hole occurs when a full thickness defect develops in the very center of the macula, usually due to age related changes.

Ocular Tumors
Ocular Tumors

Intraocular tumors are evaluated with a variety of diagnostic imaging technologies to make a diagnosis and create a personalized clinical plan. Benign lesions are typically monitored but may be treated to improve vision. Malignancies are treated in coordination with oncology teams.

Retinal Detachment
Retinal Detachment

Many conditions can lead to a retinal detachment, in which the retina separates from the back wall of the eye. The typical symptoms of a retinal detachment include floaters, flashing lights, and a shadow in the peripheral vision that can move toward the center of vision.

"I couldn't have been more pleased with this appointment!"

Dr. Courtney completely explained my condition and answered all my questions before I even gave him my list of questions. Dr. Courtney is extremely kind and communicates very well, putting everything in simple to understand language. He is very reassuring, explains available treatment, and is very gracious and willing to be available to care for you in the future. Definite 5 star rating. Thank you Dr. Courtney!!!!



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February 2019

"I'm back to seeing 20/20 again and couldn't be happier!"

I am so thankful for Dr. Courtney! I had multiple retinal tears that he repaired and, later, had a retinal detachment that he also corrected. His office staff has always been so helpful and he takes as much time as you need to understand your issues. Highly recommend Dr. Courtney!



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January 2019

"I highly recommend Dr. Adam and his associates!"

I recently had surgery to correct a macular pucker in my left eye. I am so grateful to have been referred to Dr. Adam and Colorado Retina Associates. Dr. Adam is probably the best doctor I've ever had, bar none. He is beyond competent, explains everything, is patient w/questions (even the repeated ones!) a great listener, kind and caring. In fact, the entire staff at CRA are amazing. They exemplify the best in how medicine should be practiced. I highly recommend Dr. Adam and his associates!



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June 2019

"From the moment I first set foot in the office I was treated with kindness, respect and care."

I was referred to Dr. Adam for a detached retina. From the moment I first set foot in the office I was treated with kindness, respect and care. Dr. Adam explained everything to me in a manner that made sense, every step of the way. After my surgery he was very hands on with my recovery journey and took a very practical, non-aggressive approach to my healing. He did not treat me just like another patient, he was always concerned and when I made strides in the right direction, he was just as happy and excited as I was. The whole staff is great, very easy to work with and super accommodating. I would recommend Dr. Adam and Colorado Retina Associates without hesitation every time. Thank you!



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May 2019

"Dr. Mimi Liu of Colorado Retina Associates is a surgeon of the highest professional expertise!"

For 5+ years I’ve avoided surgeries in both EYES because the surgery name ends with the word ‘PEEL’! OMG! Not only did Dr. Mimi Liu of Colorado Retina Associates meticulously perform this intricate, delicate surgery, but her confident-yet-gracious patient care skills quieted my many fears. She’s a surgeon of the highest professional expertise! If your eye doctor tells you that you need a macular membrane peel, immediately call Colorado Retina Associates and meet with Dr. Mimi Liu!



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June 2019

"The most compassionate team I have ever had to be involved with for my health"

I saw Dr. Hovland for my Ocular Melanoma treatment of Plaque Radiation. He and his staff are the most compassionate team I have ever had to be involved with for my health. They go out of their way for their patients, are very kind and gentle and reassuring about everything. I only wish I was much closer so I could see them often. You will not ever regret seeing these people!

Jen t.

Denver, CO

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October 2019

"The care they have given us has gone beyond anyone else we have seen"

We came all the way from Evansville, Indiana to see Dr. Hovland, for the purpose of enucleation due to choroidal melanoma. When we got to Colorado Retina we were immediately comforted by them. They made us feel like we were the only patients they had to see that day. Such a thorough visit; which included much education for us and very specific looking at the mass in my eye. We left Colorado Retina Associates with me having two 👁👁! And being very encouraged! We realize from our visit that things could change in the future; but if they do we'll know we are in amazingly expertise and caring hands.

Martha g.

Evansville, In

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March 2019

"Thanks for saving my vision."

I had a post vitreous detachment the last couple months and these guys it really helped me including Dr. Johnson. I have never seen such a well put together staff that work together to try to make everything right. Dr. Johnson is by far the most experienced doctor and retinal specialist I have seen in my entire life time. He is a dedicated doctor that is willing to put the work in to make sure that you and your health and I are completely safe.



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July 2018


Meet Our Doctors

Murtaza Adam ThumbnailNancy J. Christmas ThumbnailRobert J. Courtney ThumbnailMark S. Dacey ThumbnailChris L. Hagedorn ThumbnailPeter Hovland ThumbnailDavid W. Johnson ThumbnailBrian C. Joondeph ThumbnailAlan E. Kimura ThumbnailAshley L. Levison ThumbnailMimi Liu ThumbnailShalil Shukla ThumbnailMiriah M. Teeter ThumbnailBetty Zhang

Murtaza Adam


A Wisconsin native, Dr. Adam joined the team in 2017. Colorado Retina provided the opportunity for Dr. Adam to collaborate with top retina physicians and surgeons to treat complex cases and contribute to advancements in clinical research. He applies his training and extensive experience to make a direct and meaningful impact on the lives of his patients.

Murtaza Adam Full Headshot

Nancy J. Christmas


Nancy J Christmas M.D. graduated from Wellesley College and Yale University School of Medicine. She went on to complete her medical internship at the Deaconess Hospital in Boston, ophthalmic residency at the world-renowned Bascom Palmer Institute and her medical and surgical retina fellowship at the University of Iowa Hospitals and Clinics. While in college, she became involved with research at the Massachusetts Eye and Ear Infirmary and she continues to be involved in national clinical research trials at Colorado Retina.

Nancy J. Christmas Full Headshot

Robert J. Courtney


Dr. Courtney is a born and raised Colorado native, having grown up in Fort Collins, Colorado. He attended the University of Colorado in Boulder where he graduated with academic honors in Biochemistry. He then completed his medical school at the University of Colorado in Denver where he was inducted into the national medical honor society, Alpha Omega Alpha. He completed his ophthalmology residency at Casey Eye Institute, Oregon Health and Science University in Portland, Oregon. After completing his medical school and ophthalmology residency, Dr. Courtney moved to Cleveland, OH for his vitreoretinal fellowship at the Cleveland Clinic Foundation Cole Eye Institute, a national leader in vitreoretinal fellow training.

Robert J. Courtney Full Headshot

Mark S. Dacey


Dr. Mark Dacey has coordinated the uveitis service at Colorado Retina for the past decade, seeing patients with complex autoimmune and infectious ocular conditions. He is a full-time, fellowship-trained uveitis specialist, with areas of interest in scleritis, ocular cicatricial pemphigoid, retinal vasculitis, and orbital inflammation. The uveitis team at Colorado Retina is proud to be a tertiary referral center for patients in Colorado and eight surrounding states, from New Mexico in the south to North Dakota and Montana in the north.

Mark S. Dacey Full Headshot

Curtis L. Hagedorn


Dr. Curtis Hagedorn is a native Coloradan, born in Loveland Colorado. He grew up in Colorado Springs and attended Colorado College for his undergraduate education. He then left the state for ten years as he attained his medical school degree from Rush University in Chicago and received eye surgery training and retinal surgery expertise at Yale University where he received the Marvin Sears award for clinical excellence.

Chris L. Hagedorn Full Headshot

Peter G. Hovland


Rare Colorado native, Dr. Peter Hovland is a renowned ophthalmologist, specializing in macular degeneration, diabetic retinopathy, vitreoretinal surgical conditions, and ocular oncology. He began his career as a vitreoretinal surgeon in practice with his father at our original Harvard location. After his father’s retirement, Dr. Hovland ultimately merged the family practice into what has now become Colorado Retina Associates, which he remains a founding partner.

Peter Hovland Full Headshot

David W. Johnson


Dr. David Johnson was born and raised in Northern Kentucky and he completed his undergraduate and medical education in his home state. Dr. Johnson has been fortunate to practice ophthalmology in his new adopted state of Colorado since 1985.

David W. Johnson Full Headshot

Brian C. Joondeph


Brian C Joondeph completed his training as a retina surgeon in 1990 and since then has worked both in private practice and full-time academic ophthalmology. He practiced in Michigan for ten years before taking his family on a once-in-a-lifetime adventure to work and live in Auckland, New Zealand for several years. He has been in Denver for the past 15 years after returning from his academic retina position down under. Denver was a great fit for his family after New Zealand given the opportunity for outdoor adventure and sports.

Brian C. Joondeph Full Headshot

Alan E. Kimura


A native of Chicago, Dr. Kimura came to Denver to start private practice in 1996, after a lengthy career in academia. He is an ophthalmology board-certified, vitreoretinal surgeon who treats an extensive amount of retinal diseases, such as macular degeneration, diabetic retinopathy, and vascular disorders. Dr. Kimura also has special interest and advanced training in the field of inherited retinal disease. In addition to his clinical work, he serves as president of Colorado Retina, and is one of the original remaining founding partners.

Alan E. Kimura Full Headshot

Ashleigh L. Levison


Coming to us from Scottsdale, AZ, Dr. Levison is one of the newest additions to our Colorado Retina physician team. Dr. Ashleigh Levison specializes in medical and surgical retina treatment, with special interest in uveitis. She primarily cares for patients with macular degeneration, diabetic eye disease, vascular occlusions, macular disorders, epiretinal membranes, vitreomacular traction and inflammatory eye disease, also known as uveitis. Currently, Dr. Levison sees patients at all of our six locations, across the Rocky Mountain region.

Ashley L. Levison Full Headshot

Mimi Liu


Dr. Mimi Liu is a partner at Colorado Retina Associates where she has practiced for the past thirteen years. Dr. Liu is a highly trained vitreoretinal surgeon, who treats a vast majority of retinal conditions. Her areas of expertise lie in repairing retinal detachments and tears, macular puckers, and macular holes. She also takes special interest in treating patients with diabetic retinopathy, retinal vascular disease and macular degeneration.

Mimi Liu Full Headshot

Salil Shukla


My wife and I arrived in Denver in 2010 and are delighted to call Denver home. I practiced vitreoretinal surgery for 12 years before joining Colorado Retina Associates in 2019. Originally from New York, I attended college at Emory University where I obtained a Bachelor of Arts in English and subsequently attended medical school and residency at New York Medical College. I completed my vitreoretinal fellowship at the Vitreoretinal Foundation in Memphis, TN, a high-volume surgical program that laid the foundation of my surgical career.

Shalil Shukla Full Headshot

Miriah M. Teeter


Dr. Miriah Teeter is the latest addition to the Colorado Retina team, coming to us with over 11 years of practice experience as a fellowship trained vitreoretinal surgeon. Dr. Teeter has special expertise in medical and surgical treatment of retinal disease, with a focus on diabetic retinopathy, macular degeneration (AMD), retinal vascular occlusions, retinal detachment repair, and macular surgery.

Miriah M. Teeter Full Headshot



Introducing Colorado Retina’s first ever Optometrist Physician Liaison, Dr. Betty Zhang! Dr. Zhang’s position is entirely new to Colorado Retina and will continue to mold and develop over the next few months. Dr. Zhang’s role is multi-faceted and will focus mainly on additional triage services and relationship management within the optometry community. We hope our network of referring optometrists utilize Dr. Zhang to bridge the gap of communication between your office and the Colorado Retina physicians, building lasting and robust patient referral relationships while increasing referral efficiency and maximizing transparency between our two practices.

Miriah M. Teeter Full Headshot

Our Locations

Serving The Rocky Mountain Region


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