Dr. Efrain Mascareno in Chula Vista's Otay Ranch area brings a UC Berkeley School of Optometry degree, earned with honors in 1997, to Eastlake Vision Center at 2260 Otay Lakes Road in the 91915 ZIP. Diabetic eye disease screenings at this Otay Lakes Road practice generate referral reports shared with the patient's primary care team, a coordinated model used with internists at Mohammed Elsayed, MD - Oxford Care for HbA1c-correlated retinal assessment. Therapeutic board certification authorizes treatment of ocular diseases including bacterial conjunctivitis, anterior uveitis, and herpetic keratitis, expanding the practice beyond routine refraction. Memberships in the American Optometric Association, California Optometric Association, and San Diego County Optometric Association maintain continuing education and peer-review standards. Chronic dry eye cases resistant to artificial tear therapy are assessed for meibomian gland dysfunction and, when appropriate, referred for acupuncture-based tear-production stimulation at South Bay Family Acupuncture. Wavefront aberrometry maps higher-order optical distortions — coma, trefoil, and spherical aberration — at the pupil plane, guiding custom soft toric or rigid gas-permeable lens selection for patients with irregular astigmatism.