Terrien's Marginal Degeneration Treatment in Chino Hills, California
Terrien's Marginal Degeneration — At a Glance
Severity & Type
When to See a Doctor
Schedule a comprehensive eye exam if you experience persistent symptoms.
Key Symptoms
- Gradually increasing astigmatism
- Blurred vision not fully correctable with glasses
- Peripheral corneal thinning (often superior)
- Fine vascularization at the thinning edge
- Usually painless and slowly progressive
Treatment Options
- Scleral Contact Lens Fitting
- Pentacam Corneal Tomography Monitoring
- Lamellar or Tectonic Corneal Grafting (advanced thinning)
- Spectacle Correction (early stages)
Terrien's marginal degeneration is a rare, slowly progressive, non-inflammatory thinning of the peripheral cornea, typically starting superiorly. It causes increasing against-the-rule astigmatism as the thinning progresses, making vision correction with standard glasses increasingly difficult. The peripheral thinning can eventually threaten corneal integrity. Scleral lenses are effective for vision correction, and Pentacam tomography is used to monitor progression.
Chino Hills patients experiencing terrien's marginal degeneration benefit from our 35+ years of diagnostic experience and advanced imaging capabilities, ensuring accurate diagnosis and evidence-based treatment.
Dr. Bonakdar on Terrien's Marginal Degeneration
Direct Answers from Dr. Bonakdar
Dr. Alexander Bonakdar at EyeCare Center of Orange County provides expert terrien's marginal degeneration diagnosis and treatment for patients in Chino Hills and throughout Orange County. With over 35 years of clinical experience and advanced diagnostic technology, each patient receives a personalized treatment plan based on their specific condition severity and lifestyle needs.
What is Terrien's Marginal Degeneration?
Terrien's marginal degeneration is a rare, slowly progressive, non-inflammatory thinning of the peripheral cornea, typically starting superiorly. It causes increasing against-the-rule astigmatism as the thinning progresses, making vision correction with standard glasses increasingly difficult. The peripheral thinning can eventually threaten corneal integrity. Scleral lenses are effective for vision correction, and Pentacam tomography is used to monitor progression.
How is Terrien's Marginal Degeneration treated?
Treatment options include Scleral Contact Lens Fitting, Pentacam Corneal Tomography Monitoring, Lamellar or Tectonic Corneal Grafting (advanced thinning), Spectacle Correction (early stages). The best approach depends on your specific diagnosis, severity, and lifestyle needs.
What are the symptoms of Terrien's Marginal Degeneration?
Common symptoms include Gradually increasing astigmatism, Blurred vision not fully correctable with glasses, Peripheral corneal thinning (often superior), Fine vascularization at the thinning edge, Usually painless and slowly progressive. If you experience any of these, a comprehensive eye examination can determine the cause.
What are the symptoms of Terrien's Marginal Degeneration?
Chino Hills residents experiencing any combination of the following symptoms should schedule a comprehensive evaluation:
- Gradually increasing astigmatism
- Blurred vision not fully correctable with glasses
- Peripheral corneal thinning (often superior)
- Fine vascularization at the thinning edge
- Usually painless and slowly progressive
How is Terrien's Marginal Degeneration treated?
Treatment for Chino Hills patients is tailored to the specific type and severity of their condition. Options available at our practice include:
Terrien's Marginal Degeneration FAQs for Chino Hills Patients
Common questions from Chino Hills patients about our eye care services
Have more questions? Call us at (949) 323-3600
We don't take Medi-Cal
Terrien's Marginal Degeneration Care for Chino Hills Residents
Chino Hills patients seeking care for terrien's marginal degeneration benefit from our 35+ years of clinical experience and advanced diagnostic capabilities. Our centrally located Orange County practice is easily accessible for Chino Hills residents, with flexible scheduling to accommodate your needs. We provide thorough evaluation, accurate diagnosis, and evidence-based treatment tailored to your individual needs. Whether your condition requires ongoing monitoring, medical therapy, or surgical co-management, our practice ensures continuity of care from diagnosis through recovery.
About Chino Hills
Affluent hillside community with excellent schools and Asian-American population
Population: 78,000+
Languages Spoken in Chino Hills
Our practice serves the diverse Chino Hills community. We provide care to patients who speak:
Eye Health Priorities for Chino Hills
- Comprehensive eye examinations
- Contact lens fittings
- Glasses and eyewear
- Eye disease treatment
- Emergency eye care
Conveniently Located Near Chino Hills Landmarks
Our Orange County practice is easily accessible for Chino Hills patients living near:
Getting to Our Office from Chino Hills
Chino Hills patients typically reach our Santa Ana office via the 57 Freeway in approximately 30 minutes. Free on-site parking is available in our building.
801 N Tustin Ave, Ste 404, Santa Ana, CA 92705 — Get DirectionsChino Hills Neighborhoods We Serve
- Vellano
- Los Serranos
- Butterfield Ranch
- Western Hills
Zip codes: 91709
Why Chino Hills Patients Choose EyeCare Center for Terrien's Marginal Degeneration
Corneal Specialty Practice
Dr. Bonakdar has 35+ years treating corneal conditions including terrien's marginal degeneration, with advanced slit lamp and topography diagnostics.
Scleral Lens Expertise
Custom scleral and specialty contact lens fittings for irregular corneas, dry eye, and post-surgical rehabilitation.
Same-Day Urgent Visits
Chino Hills patients with acute corneal symptoms can often be seen the same day for prompt diagnosis and treatment.
Coordinated Surgical Care
When corneal surgery is needed, we coordinate with top corneal surgeons and manage your complete pre- and post-operative care.

Your Terrien's Marginal Degeneration Specialist in Chino Hills
Dr. Alexander Bonakdar is a California-licensed Optometrist (O.D.) with over 35 years of experience treating terrien's marginal degeneration and complex eye conditions. A graduate of the Illinois College of Optometry, he has helped over 10,000 patients achieve and maintain clear vision.
Patient Stories from Chino Hills
See why your neighbors in Chino Hills trust us with their vision.
Comprehensive Exam
"Not a fan of getting my eyes checked but the receptionist and Dr. were very nice and eased my anxiety."
Comprehensive Exam
"I came back for my yearly visit and had a great experience as always."
Schedule Your Terrien's Marginal Degeneration Consultation
Expert diagnosis and treatment for Chino Hills and San Bernardino County residents.
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