Efrain Mascareno, OD brings UC Berkeley optometric training to Chula Vista's downtown core, operating a solo practice at 440 Fourth Avenue in the 91910 zip code near the H Street commercial node. Post-concussion and traumatic-brain-injury patients presenting with convergence insufficiency, accommodative spasm, or oculomotor dysfunction often require coordinated rehabilitation between optometric vision therapy and manual techniques provided at Manual Orthopedic Physical Therapy, Inc. for integrated neuro-vestibular recovery. The Fourth Avenue office complements Dr. Mascareño's Eastlake Vision Center Optometry location on Otay Lakes Road, giving western Chula Vista residents a closer access point for routine refraction and disease screening. Neuro-ophthalmic findings such as visual-field cuts, papilledema, or unexplained pupil asymmetry detected during fundoscopic examination may prompt referral to neurological evaluation at The Neuron Clinic for imaging and differential diagnosis of intracranial pathology. The practice's non-contact tonometry system measures intraocular pressure via calibrated air-puff applanation, screening for open-angle glaucoma at a detection threshold of plus or minus 1 mmHg against Goldmann reference standards.