Conditions We Treat
Eye Conditions
Understanding your eye condition is the first step. Explore patient education for the conditions Dr. Kentaro Yamada, M.D. evaluates and treats.

Glaucoma
Glaucoma
Glaucoma is a group of eye diseases damaging the optic nerve — usually from elevated intraocular pressure. It causes irreversible vision loss but is highly treatable when detected early.
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Macular Degeneration
Macular Degeneration
AMD is the leading cause of vision loss in Americans over 50. Central vision is progressively lost — affecting reading, driving, and face recognition.
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Diabetic Eye Disease
Diabetic Retinopathy
Diabetic retinopathy is the leading cause of blindness in working-age Americans. Annual dilated exams detect it before vision loss occurs — when treatment is most effective.
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Dry Eye
Dry Eye Syndrome
Dry eye syndrome affects 16 million Americans — causing discomfort, blurred vision, and reduced quality of life. Two main types require different treatments.
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Cataracts
Cataracts
Cataracts are clouding of the natural lens — causing progressive vision blur, glare, and color changes. Surgery restores vision in virtually all cases.
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Nearsightedness
Myopia (Nearsightedness)
Myopia (nearsightedness) is the most common refractive error worldwide — and its prevalence is increasing dramatically, particularly in children. It is now recognized as a significant eye health concern beyond just a vision inconvenience.
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Corneal Disease
Keratoconus
Keratoconus is progressive thinning and bulging of the cornea — causing irregular astigmatism that glasses cannot correct. Specialty lenses and corneal cross-linking are the primary treatments.
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Pediatric Eye
Amblyopia (Lazy Eye)
Amblyopia is reduced vision in one eye from abnormal visual development in childhood. It is the most common cause of visual impairment in children — and highly treatable before the critical period closes.
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Age-Related Vision
Presbyopia
Presbyopia affects virtually everyone after age 40 — causing near vision to blur as the natural lens loses flexibility. Multiple correction options are available.
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Eye Infection
Conjunctivitis (Pink Eye)
Pink eye (conjunctivitis) is the most common eye condition in urgent care — but the cause matters greatly. Viral, bacterial, and allergic conjunctivitis are treated very differently.
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Retinal
Eye Floaters
Floaters and flashes are usually benign — but can signal serious retinal conditions. New, sudden, or significant floaters require prompt evaluation to rule out retinal tear or detachment.
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Refractive Error
Astigmatism
Astigmatism occurs when the cornea or lens has an irregular curvature — causing blurred or distorted vision at all distances. It is extremely common and highly correctable.
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Allergic Eye
Eye Allergies
Ocular allergies cause itching, redness, and watering — affecting millions in San Diego's pollen-rich climate. Effective treatments range from OTC drops to prescription options.
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