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Dr. Howard Guan
Ophthalmology – Glaucoma Specialist
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Dr. Howard Guan
Ophthalmology – Glaucoma Specialist
San Marcos, CA
Areas of Expertise
About Me
Dr. Howard Guan is a glaucoma specialist who cares for adults with a wide range of vision needs at Prestera Eye Medical Group in North County San Diego. He provides comprehensive glaucoma management—from diagnostics and medical therapy to laser treatments and advanced surgical options—and also performs cataract surgery. Dr. Guan completed his ophthalmology residency at Loma Linda University Medical Center and a glaucoma fellowship in the Department of Ophthalmology at Boston University. Earlier training includes a transitional year at Arrowhead Regional Medical Center, an MD from Loma Linda University, and a biochemistry and molecular biology degree from UC Irvine, where he graduated cum laude. Patients appreciate Dr. Guan’s calm, clear communication and collaborative approach to decision-making. He tailors care to each patient’s goals, offering options such as selective laser trabeculoplasty (SLT), MIGS procedures, tube shunts, trabeculectomy, and sustained-release medication implants when appropriate. His work has been recognized with Surgical Teacher of the Year and Clinical Teacher of the Year honors at Loma Linda University Eye Institute. Whether you’re seeking a second opinion or ongoing glaucoma and cataract care, Dr. Guan focuses on preserving vision with evidence-based, compassionate treatment.
Training
GlaucomaBoston UniversityFellowship- OphthalmologyLoma Linda University Medical CenterResidency
Medical Doctor (MD)Loma Linda UniversityMedical School
BA, Biochemistry and Molecular Biology (Cum Laude)University of California, IrvineUndergraduate
Awards & Honors
Surgical Teacher of the Year
Loma Linda University Eye Institute ResidencyClinical Teacher of the Year
Loma Linda University Eye Institute ResidencyAlpha Omega Alpha Honor Society
Epsilon ChapterPhi Beta Kappa
Mu ChapterRegents Scholarship
University of California, Irvine
Certifications & Licensure
- Licensed In:CA
- License Numbers:A119766


