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Does an Eye Exam Show Diabetes?

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An older adult sits in front of a slit lamp while their eye doctor examines their eyes for signs of diabetes.

When we think about eye exams, we often picture reading letters on a chart or getting a new prescription for eyeglasses. But there’s far more to an eye exam than meets the eye. Did you know a comprehensive eye exam can uncover signs of major health conditions, such as diabetes?

At Cherry Creek Eye Physicians & Surgeons, we believe that your vision health is closely linked to your overall well-being. Understanding the connection between diabetes and eye health can empower you to take proactive steps toward preserving your vision and managing your health.

How Eye Exams Help Detect Diabetes

Your eyes provide a unique window into your health. A comprehensive eye exam, particularly one where your eyes are dilated for a closer look, can reveal early signs of diabetes, sometimes before you notice symptoms elsewhere in your body.

Diabetes affects the blood vessels throughout the body, including those in your retina, the light-sensitive tissue at the back of your eye. During a dilated exam, eye doctors examine your retina to look for changes in these vessels. Early indicators of diabetes may include leaking blood vessels, swelling, or even tiny retinal hemorrhages.

While an eye exam alone can’t officially diagnose diabetes, it can serve as a powerful early warning sign and prompt a referral to your primary care physician. In fact, eye doctors are often among the first healthcare professionals to detect signs of this systemic disease.

The Connection Between Diabetes & Eye Health

Diabetes can silently affect your vision, and the damage it causes isn’t always reversible. The most common diabetes-related eye condition is diabetic retinopathy, which occurs when elevated blood sugar damages the small blood vessels in your retina.

Without proper care, this condition can lead to serious complications, including vision loss or even blindness. Symptoms of diabetic retinopathy may include:

  • Blurry or fluctuating vision
  • Difficulty seeing colors
  • Dark or empty areas in your field of vision
  • Persistent eye floaters
  • Sudden vision loss in more advanced stages

Another potential complication is diabetic macular edema, which happens when fluid leaks into the macula (the part of the retina responsible for your central vision). Both conditions can progress without noticeable symptoms in the early stages, making regular eye exams essential for early detection and treatment.

How Often Should You Schedule Eye Exams?

Routine eye exams are an essential part of overall health care, particularly for those with diabetes. The American Diabetes Association recommends:

  • Type 2 diabetes: Schedule a comprehensive dilated eye exam at the time of diagnosis.
  • Type 1 diabetes: Have your first eye exam within 5 years of diagnosis.
  • Annual exams: After your first screening, plan for yearly eye exams, or more frequently if advised by your doctor.

For individuals without diabetes, annual eye exams are still important, especially if you have risk factors like high blood pressure, high cholesterol, or a family history of eye disease.

Several diabetes medications sit together with a blood sugar monitor on a white table.

How Diabetes Medications Can Affect Your Vision

Managing diabetes with medications is a key part of maintaining overall health, but it’s important to understand how some of these treatments may temporarily affect your eyes.

When blood sugar levels are brought down quickly through insulin, oral medications, or injectable therapies, it can sometimes result in temporary vision changes or even influence existing eye conditions.

Insulin & Rapid Blood Sugar Control

Insulin is a powerful tool in managing diabetes, especially for individuals with significantly elevated blood sugar. However, when glucose levels drop too quickly, it can lead to blurred vision or changes in the shape of the eye’s lens. These shifts are usually short-term but can be disorienting at first. For people with diabetic retinopathy, rapid improvement in blood sugar levels may temporarily worsen retinal damage before stabilizing.

Hypoglycemia-Related Vision Issues

Some oral medications, particularly sulfonylureas, can cause episodes of low blood sugar (hypoglycemia). When this happens, people may experience sudden changes in vision, such as blurriness or difficulty focusing. These effects typically resolve once blood sugar levels return to normal, but repeated lows can be problematic if left unaddressed.

Ozempic & Retinopathy Risks

GLP-1 receptor agonists like Ozempic have shown excellent results in lowering blood sugar and supporting weight loss. However, some research suggests they may be associated with a temporary worsening of diabetic retinopathy, especially if blood sugar improves too rapidly in people with existing eye disease. This makes regular eye exams especially important when starting or adjusting these medications.

Eye Exams Go Beyond Your Vision

While detecting diabetic eye disease is a major benefit of regular eye exams, your eyes can also provide clues to other serious health conditions. At Cherry Creek Eye Physicians & Surgeons, our thorough exams can uncover signs of:

  • High cholesterol, visible as deposits in your cornea
  • Hypertension, through changes in the blood vessels of the retina
  • Autoimmune conditions like lupus or rheumatoid arthritis, which may cause inflammation in or around the eyes
  • Certain cancers, such as ocular melanoma or lymphoma, can present subtle signs during an eye exam

Your eye exam is more than just a check-up for glasses, it’s a window into your overall health.

Preserve Your Visual Health 

Diabetes-related eye damage often develops without warning, catching many people off guard. At Cherry Creek Eye Physicians & Surgeons, we can help through early detection, education, and personalized care to preserve your vision.

Don’t wait for symptoms to appear. Whether you’ve been managing diabetes for years or are newly diagnosed, a comprehensive eye exam is an essential step in your health journey. Schedule your visit to Cherry Creek Eye Physicians & Surgeons today, and take control of your vision and your health. 

Written by Dr. Stuart Lewis, Dr. Rachel Lewis & Dr. Tammy Gray

Dr. Stuart Lewis, OD

Dr. Stuart Lewis moved to Denver in 1979 after receiving his Bachelor of Arts in neurobiology and behavior from Cornell University in 1974, earning his Doctor of Medicine from George Washington University in 1978 and completing an internal medicine internship at Northwestern University in 1979. At the conclusion of his ophthalmology residency at the University of Colorado in 1982, he entered private practice.

Dr. Lewis was board-certified by the American Board of Ophthalmology in 1983 and was elected to be a Fellow and Diplomat of the American Academy of Ophthalmology in 1984. In 2018, he was selected as a Lifetime Member of the American Academy of Ophthalmology.

Dr. Lewis has been an active community member in Denver, having built the Cherry Creek Eye Center in 1985, one of the first inclusive Eye facilities in Denver, and created Cherry Creek Eye Physicians & Surgeons, P.C. He has served on various boards, including the Investigational Research Review Board at Rose Medical Center, and was an original board member at Harvard Park Surgical Center.

Dr. Lewis served at least 2 terms as Chairman of the Department of Ophthalmology at Rose Medical Center. He also holds a position as Assistant Clinical Professor in the Department of Ophthalmology at the University of Colorado eye residency program and was a Visiting Professor of Ophthalmology at the Elias Santana Hospital in the Dominican Republic.

In 2018, Cherry Creek Eye Physicians and Surgeons, P.C. was listed as the 36th highest-rated business in Colorado based on patient reviews by “Top Rated.” Dr. Lewis is an active alpine and cross-country skier, bicyclist, and golfer. He also enjoys travel, birding, bridge, and opera.

Dr. Rachel Lewis, OD

Dr. Rachel Lewis is a highly skilled optometrist contributing her passion for eye care and a wealth of experience to Cherry Creek Eye Physicians & Surgeons, P.C.

Dr. Lewis earned her Doctor of Optometry degree from New England College of Optometry in Boston, MA. Before pursuing her optometry degree, she completed a Pre-Health Post Baccalaureate Program at New York University and University of Colorado Denver. She holds a Bachelor of Arts in Political Science from Amherst College and spent time studying abroad at Université de Grenoble in France.

Her area of practice is comprehensive primary eye care, with a focus in ocular surface diseases such as dry eye and keratoconus. Her practice also includes contact lens services (specialty, multifocal and soft contact lens fittings), myopia control, glaucoma management, pre-operative evaluations and post-operative care for a wide range of procedures.

Dr. Lewis is deeply committed to public service and has volunteered her expertise at the Colorado Coalition for the Homeless, Stout Street Eye Clinic. She has also traveled to Honduras on a medical mission trip to provide primary care services and eyeglasses to underserved communities.

Outside of her practice, Dr. Lewis enjoys spending time with her husband and children. She takes advantage of the Colorado lifestyle as much as possible with outdoor activities including skiing, camping, tennis and golf. She is also passionate about experiencing other cultures through travel and cuisine.

Whether you are seeking routine eye exams, specialized contact lens fittings, or the management of complex ocular conditions, Dr. Lewis is here to help.

Dr.Tammy Gray, OD

Dr. Tammy Gray has been a key member of the Cherry Creek Eye Physicians & Surgeons team since 2012 and has practiced in Colorado since 2008. Her blend of professionalism and personal warmth makes her a valued member of our team and community.

After earning her Doctor of Optometry degree from the New England College of Optometry in Boston, MA, in 2006, Dr. Gray honed her skills with a residency in Ocular Disease and Surgical Co-Management at Eye Care Associates of Nevada. Her journey into optometry was built on a solid foundation with a Bachelor of Science degree in Microbiology from Colorado State University in Fort Collins, CO.

Dr. Gray is passionate about providing comprehensive primary eye care, focusing on anterior segment diseases, like keratoconus and dry eye, and fitting scleral contact lenses.

Outside the office, Dr. Gray loves spending quality time with her husband, son, and extended family. She’s a supportive sports mom, cheering on her son at his sporting events, and relishes the joy of movies, live theatre, reading, and exploring new places through travel.

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