The Future of Retina Care At the Karalis Johnson Retina Center, we not only provide the most advanced treatments for patients with retinal conditions, but are also using research to move our care forward. Research scientists and doctors work side by side at this new center, making it one of only three centers in the country where patients can benefit from the combination of clinical care and the latest retinal research and discoveries in a single environment. The Karalis Johnson Retina Center is dedicated to providing specialized care for retinal diseases such as macular degeneration, diabetic retinopathy, retinal detachment, uveitis and other retinal eye conditions as well as optometric services.