William D. Mosier, M.D.

Dr. Mosier is a board certified ophthalmologist specializing in Comprehensive Ophthalmology. He is an accomplished and highly skilled cataract and anterior segment eye surgeon with extensive experience in the diagnosis and treatment of eye diseases.

Dr. Mosier completed his residency in Ophthalmology at the University of California, Irvine School of Medicine. He is a former Associate Clinical Professor of Ophthalmology at the University of California, Irvine and is the founder and medical director of the Mosier Eye Center Medical Group in Fullerton, California.

Dr. Mosier is a Fellow of the American Academy of Ophthalmology and a member of the American Society of Cataract and Refractive Surgery, California Association of Ophthalmology, California Medical Association, Orange County Medical Association, and the Orange County Society of Ophthalmology. He is an active member of the medical staff at St. Jude Medical Center, Fullerton.

Dr. Mosier and his staff are committed to providing his patients with only the highest quality medical and surgical eye care, and vision care. His golden rule has always been to “treat my patients as I would expect to be treated”. Dr. Mosier has contributed to the Southern California community in many ways throughout his career and has been recognized by the California State Senate and Orange County Board of Supervisors for his volunteerism in providing charitable specialty care services to medically indigent residents in Orange County.

Dr. Mosier and his wife have three children, and three grandchildren. He enjoys the outdoors- camping, hiking, and fishing- as well as, gardening and cooking.

Our goal is to provide superior vision and patient care.
All of our opticians are certified by the American Board of Opticianry (ABOC).
  • To provide the highest-quality lenses possible to our patients.
  • To ensure patient comfort while wearing their glasses.
  • To provide patients with the best vision possible.
  • To give superior eye protection.
Mosier Eye Center will do its very best to meet your eyeglasses or contact lenses needs. Our patients are given a wide selection of eyeglass frames, lenses and contact lenses to choose from in our Optical Shop. A full service lab is available to prepare the lenses for patients while they wait.


Monday-Friday – 8:30 – 5:30
Saturday-Sunday – Closed

Make An Appointment

To schedule or reschedule an appointment, call 714-871-2570. Outside business hours, please email us. If you have any comments about your visit please share them with us.