Excellent Doctor, amazing person, Dr Chao taking care of all my family members and each of us got very ggod vision ,I had on both eye cataract surgery, and about 2 years ago cleaning the vision with laser,the same had my husband my Mom and my daughter costumized lasik, I know Dr. CHAO OVER THAN 10 YEARS.RECOMANDING him to everyone the best Ophthalmologist, eye surgeon