He is the co-inventor of the PAXOS Scope smartphone adapter to take pictures of the eye, which was licensed to Digisight Technologies. He completed the Stanford Biodesign Faculty Fellow program and has led multiple Stanford-China, Hong Kong, and Brazil Hackathons to teach the process of medtech/digital health innovation. In 2016, his consumer health wearable startup was awarded the Robert Howard Next Step Award from Lunar and a Spectrum Medtech grant. Besides exemplifying physician innovation and entrepreneurship, Dr. Chang is a full-time glaucoma and cataract surgeon and early adopter of cutting edge diagnostic and surgical technologies.