Overview
Nasir earned his medical degree from the University of Texas Health Science Center at San Antonio where he ranked first in his class. He was honored as a recipient of the Lange Medical Publications Award. Following his internship at Baylor College of Medicine, he completed his residency at the University of California, San Francisco, a well known center for research and clinical practice.Dr. Nasir pursued post-graduate work as a Fellow in Vitreoretinal Research and Clinical Studies at Duke University, where he also trained with Dr. Robert Machemer, who invented the first vitrectomy machine and is considered the father of modern vitreous surgery. He was chosen as a Heed Ophthalmic Foundation Fellow and was the recipient of a grant for the Research to Prevent Blindness Foundation.Dr. Nasir is a diplomate of the American Board of Ophthalmology, a member of the American Society of Retina Specialists, the American Academy of Ophthamology, and the Association for Research in Vision and Ophthalmology. Dr. Nasir is a co-founder of the California Retina Research Foundation and has been the principal investigator or coinvestigator for numerous national clinical trials at California Retina Consultants. His research interests include choroidal neovascularization associated with age-related macular degeneration, as well as adjunctive pharmacological therapies used in the surgeries for diabetic retinopathy and proliferative vitreoretinopathy. The results of his work have been reported in distinguished journals such as the American Journal of Ophthalmology, Ophthalmology, the British Journal of Ophthalmology and Retina. He and his colleagues at California Retina Consultants published the first series of patients treated with Avastin for age-related macular degeneration and subsequent peer reviewed articles for the use of Avastin for other retinal diseases. Dr. Nasir is a representative and a past vice president of the California Academy of Ophthalmology as well as a member of S.E.E. International and with his colleagues regularly train ophthalmologists from developing countries.Clinically, Dr. Nasir is particularly interested in age-related macular degeneration, diabetic retinopathy, complex retinal detachments and macular surgery. His research and surgical foci are balanced with a keen concern for patient care.As vitreoretinal specialists, we provide comprehensive medical and surgical treatment for all disorders of the retina, macula and vitreous. We focus on the diagnosis, prevention and treatment of these conditions. Many abnormalities of the retina and vitreous may cause visual loss. These disorders include macular degeneration, diabetic retinopathy, retinal detachment, macular holes, macular edema and epiretinal membranes. Our practice has multiple locations throughout Central California to serve our patients.
Dr. Nasir is rated as an Experienced provider by MediFind in the treatment of Central Serous Chorioretinopathy. His top areas of expertise are Age-Related Macular Degeneration (ARMD), Late-Onset Retinal Degeneration, Retinal Vein Occlusion, and Retinal Artery Occlusion.
His clinical research consists of co-authoring 2 peer reviewed articles. MediFind looks at clinical research from the past 15 years.
Insurance
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Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- EPO
- HMO
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- OTHER MEDICARE
- POS
- PPO
- OTHER MANAGED MEDICAID
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MEDICARE MAPD
- HMO
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
1801 N Solar Dr, Ste 145, Oxnard, CA 93030
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
David Boyer is an Ophthalmologist in Encino, California. Dr. Boyer is rated as a Distinguished provider by MediFind in the treatment of Central Serous Chorioretinopathy. His top areas of expertise are Age-Related Macular Degeneration (ARMD), Late-Onset Retinal Degeneration, Retinal Detachment, and Diabetic Retinopathy. Dr. Boyer is currently accepting new patients.
Kheiron Retina
Sandeep Khanna is an Ophthalmologist in Los Angeles, California. Dr. Khanna is rated as a Distinguished provider by MediFind in the treatment of Central Serous Chorioretinopathy. His top areas of expertise are Diabetic Retinopathy, Central Serous Chorioretinopathy, Retinal Detachment, and Age-Related Macular Degeneration (ARMD). Dr. Khanna is currently accepting new patients.
California Retina Consultants
Dr. Castellarin graduated first in his class from the University of Verona School of Medicine in Verona, Italy. Following his ophthalmology training, he completed an ophthalmology residency summa cum laude and then became an instructor of ophthalmology at the Verona School of Medicine. In addition to working in a clinical practice, Dr. Castellarin was a primary investigator in the Verona Diabetes Study.After several years of research and teaching in Italy, Dr. Castellarin moved to the United States where he completed a general surgery internship at St. Barnabas Medical Center. Then, during an additional ophthalmology residency at the University of Medicine and Dentistry in Newark , New Jersey, Dr. Castellarin was chosen to be chief resident. He was also presented with the Alfonse Cinotti Award in recognition of his academic and professional excellence as an ophthalmology resident. Dr. Castellarin received his vitreoretinal fellowship training at Emory University with pioneer surgeon, Dr. Thomas Aaberg.Dr. Castellarin has recently been nationally recognized as the top retina fellow. He was presented with the prestigious Ronald M. Michels Fellowship Award for his contributions to vitreoretinal research and surgery. He was also honored with a National Eye Institute Travel Grant during his work at Emory University. His research interests include diabetic retinopathy, age-related macular degeneration and retinal pigment epithelium transplantation. Dr. Castellarin has also been involved in several national multicenter clinical trials and results of his work have been published in highly acclaimed journals such as Ophthalmology, Retina, the American Journal of Ophthalmology, the British Journal of Ophthalmology and The Lancet. Dr. Castellarin is a diplomate of the American Board of Ophthalmology, a member of the Association for Research in Vision and Ophthalmology and the American Academy of Ophthalmology.As vitreoretinal specialists, we provide comprehensive medical and surgical treatment for all disorders of the retina, macula and vitreous. We focus on the diagnosis, prevention and treatment of these conditions. Many abnormalities of the retina and vitreous may cause visual loss. These disorders include macular degeneration, diabetic retinopathy, retinal detachment, macular holes, macular edema and epiretinal membranes. Our practice has multiple locations throughout Central California to serve our patients. Dr. Castellarin is rated as a Distinguished provider by MediFind in the treatment of Central Serous Chorioretinopathy. His top areas of expertise are Age-Related Macular Degeneration (ARMD), Late-Onset Retinal Degeneration, Diabetic Retinopathy, Retinal Vein Occlusion, and Vitrectomy.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Advanced
- Age-Related Macular Degeneration (ARMD)
- Diabetic RetinopathyDr. Nasir isAdvanced. Learn about Diabetic Retinopathy.
- EndophthalmitisDr. Nasir isAdvanced. Learn about Endophthalmitis.
- Late-Onset Retinal DegenerationDr. Nasir isAdvanced. Learn about Late-Onset Retinal Degeneration.
- Retinal Artery OcclusionDr. Nasir isAdvanced. Learn about Retinal Artery Occlusion.
- Retinal DetachmentDr. Nasir isAdvanced. Learn about Retinal Detachment.
- Experienced
- Brown SyndromeDr. Nasir isExperienced. Learn about Brown Syndrome.
- Central Serous ChorioretinopathyDr. Nasir isExperienced. Learn about Central Serous Chorioretinopathy.
- Coats DiseaseDr. Nasir isExperienced. Learn about Coats Disease.
- Familial Exudative VitreoretinopathyDr. Nasir isExperienced. Learn about Familial Exudative Vitreoretinopathy.
- Geographic AtrophyDr. Nasir isExperienced. Learn about Geographic Atrophy.
- Retinal Vasculopathy with Cerebral Leukodystrophy