Chan provides routine eye exams, consultation and treatment for adults and children. zithromaxstore.org. She evaluates those needing eyeglasses, or those with failed vision screenings. She also provides medical and surgical treatment of more complex disorders such as cataracts, strabismus (misalignment of the eyes), amblyopia (lazy eye), nasolacrimal duct obstruction (blocked tear ducts) and childhood ptosis (droopy eyelid).