I am proud to introduce the newest doctor on our team. Dr. Calvin Sun, O.D., has joined The Eye Care Center LTD and is now seeing patients across our Chicagoland practice. Dr. Sun brings a strong foundation in medical eye care, a particular talent for challenging contact lens fittings, and a calm, methodical approach that our patients are going to appreciate from the very first visit.
Adding a doctor of Dr. Sun’s caliber means more appointment availability, shorter waits for specialty visits, and another experienced set of eyes on the conditions that need careful, ongoing management.
From Berkeley to Chicagoland
Dr. Sun was born and raised in the suburbs of Los Angeles. He earned his undergraduate degree in Integrative Biology from the University of California, Berkeley, then came to Chicago to complete his Doctor of Optometry at the Illinois College of Optometry, graduating in 2024.
During his fourth-year clinical rotations in Illinois and Minnesota, he built hands-on experience in comprehensive eye exams, ocular disease, vision therapy, and specialty contact lenses. After graduation, he returned to California and spent two years in private practice serving a large geriatric community. That setting gave him deep, day-to-day experience managing glaucoma, macular degeneration, and dry eye in older adults, conditions where consistent monitoring makes a real difference in long-term vision. We are thrilled he chose to come back to Chicagoland and build the next chapter of his career with us.
Dr. Sun’s Areas of Focus
- Dry eye management
- Custom and specialized contact lens fittings
- Complex corneal conditions, including chemical burns
- Veteran eye care advocacy
Dry eye is one of the most common reasons patients come to see us, and it is far more than a minor annoyance. An estimated 16.4 million U.S. adults have been diagnosed with dry eye disease, according to a 2017 study published in the American Journal of Ophthalmology, and many more live with symptoms that have never been evaluated. Dr. Sun works hand in hand with our Dry Eye Clinic to identify the underlying cause and build a treatment plan that brings lasting relief.
For patients who have been told they are “hard to fit” for contacts, Dr. Sun is an excellent match. He enjoys the problem-solving involved in specialty contact lenses, including scleral lenses for irregular corneas and conditions such as keratoconus. He also has experience caring for complex corneal injuries, including chemical burns. If a chemical ever splashes into your eye, flush it immediately with clean water for at least 15 minutes and seek urgent care right away.
Dr. Sun is also a dedicated advocate for veteran eye care services. Veterans and their families can count on a doctor who understands the importance of accessible, thorough care for those who have served.
A Professional Go Player in the Exam Room
Here is something you may not expect from your eye doctor. Dr. Sun has been a professional player of Go, the ancient strategy board game, since 2013. Go rewards patience, pattern recognition, and the discipline to think several moves ahead, and Dr. Sun brings that same conscientiousness to every patient he sees.
A standard Go board has roughly 2 x 10170 possible legal positions, a number calculated by researchers John Tromp and Gunnar Farnebäck that dwarfs the estimated 1080 atoms in the observable universe. Mastering a game that complex takes focus and careful judgment, the same qualities that matter when you are fitting a specialty lens to an irregular cornea or tracking subtle changes in a glaucoma patient over time.
Outside the office, Dr. Sun enjoys watching sports, exercising, exploring Chicago, and finding new cafes around the city.
Schedule With Dr. Sun
Dr. Sun is welcoming new and returning patients at The Eye Care Center LTD. Whether you need a comprehensive eye exam, treatment for persistent dry eye, or a contact lens fitting that finally feels right, we would love to see you. You can learn more on Dr. Sun’s profile page or meet our full team of doctors.
Please join me in giving Dr. Sun a warm welcome to our practice and to our Addison, Burbank, and Willowbrook communities.
Book Your Visit With Dr. Calvin Sun
Call (888) 899-0816 or schedule online.
Addison: 1250 W Lake St #19c, (630) 543-0607
Burbank: 8525 S Harlem Ave, (708) 599-0050
Willowbrook: 6300 Kingery Hwy #116, (630) 969-2807
Se habla español.
Frequently Asked Questions
Where does Dr. Calvin Sun see patients?
Dr. Sun is part of The Eye Care Center LTD team serving our Addison, Burbank, and Willowbrook, IL locations. Call (888) 899-0816 to find his next available appointment at the office most convenient for you.
What does Dr. Sun specialize in?
Dr. Sun focuses on dry eye management, specialty contact lenses, challenging and specialized contact lens fittings, and complex corneal conditions such as chemical burns. He also has extensive experience managing glaucoma and macular degeneration.
Is Dr. Sun accepting new patients?
Yes. Dr. Sun is welcoming new and returning patients. You can book online or call (888) 899-0816 to schedule.
Where did Dr. Sun complete his training?
Dr. Sun earned his undergraduate degree in Integrative Biology from the University of California, Berkeley, and his Doctor of Optometry from the Illinois College of Optometry in 2024.
