Dr. Howard Guan

OphthalmologyGlaucoma Specialist
San Marcos, CA

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

  • Boston University

    Glaucoma

    Boston University

    Fellowship
  • Ophthalmology

    Loma Linda University Medical Center

    Residency
  • Loma Linda University

    Medical Doctor (MD)

    Loma Linda University

    Medical School
  • University of California, Irvine

    BA, Biochemistry and Molecular Biology (Cum Laude)

    University of California, Irvine

    Undergraduate

Awards & Honors

  • Surgical Teacher of the Year

    Loma Linda University Eye Institute Residency

  • Clinical Teacher of the Year

    Loma Linda University Eye Institute Residency

  • Alpha Omega Alpha Honor Society

    Epsilon Chapter

  • Phi Beta Kappa

    Mu Chapter

  • Regents Scholarship

    University of California, Irvine

Certifications & Licensure

Licensed In
CA
License Numbers
A119766

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Dr. Howard Guan

Ophthalmology Glaucoma Specialist