Tom S Chang: Pioneer With His Eye on the Future

Dr. Tom S. Chang is an ophthalmologist in Pasadena, California, and is connected with numerous institutions in the region, including Adventist Health Bakersfield and Methodist Hospital of Southern California. He earned his medical degree from the University of Toronto Faculty of Medicine and has been in practice for more than 20 years (Topionetworks).




One question that is often put to Dr. Chang involves eye exams.

“If my eyesight is not changed, why require an eye examination?”

This is a matter we hear every day in our clinics. But eye examinations are not just for people with impaired eyesight; excellent vision does not imply healthy eyes. In reality, Tom S Chang MD explains,some diseases in the eye do not show signs in the early stages but may cause problems along the way, including irreversible vision loss if left unprocessed.


Examine your eye




Glaucoma is a degenerative optic nerve disease – see it as the wire that connects your eyes with your brain. Glaucomas, Tom S Chang MD explains, happen when the pressure of the eye reaches a level not resistible for the optic nervous system, causing peripheral vision impairment and loss (your “side” view), which is needed for driving, seeing objects coming up behind you, and sensing motion and flicker stimuli.