Timothy W. Olsen

ORCID: 0000-0002-2200-266X
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About
Contact & Profiles
Research Areas
  • Retinal Diseases and Treatments
  • Glaucoma and retinal disorders
  • Retinal Imaging and Analysis
  • Intraocular Surgery and Lenses
  • Retinal and Optic Conditions
  • Retinal Development and Disorders
  • Retinal and Macular Surgery
  • Retinopathy of Prematurity Studies
  • Ocular Diseases and Behçet’s Syndrome
  • Corneal surgery and disorders
  • Marriage and Sexual Relationships
  • Ocular Infections and Treatments
  • Ocular Oncology and Treatments
  • Corneal Surgery and Treatments
  • Ophthalmology and Visual Impairment Studies
  • Traumatic Ocular and Foreign Body Injuries
  • CNS Lymphoma Diagnosis and Treatment
  • Cerebral Venous Sinus Thrombosis
  • Neural dynamics and brain function
  • Vascular Malformations Diagnosis and Treatment
  • Ocular Surface and Contact Lens
  • Ocular and Laser Science Research
  • Photoreceptor and optogenetics research
  • Acute Ischemic Stroke Management
  • Lymphoma Diagnosis and Treatment

Mayo Clinic
2017-2024

University of Minnesota Rochester
2022-2024

Mayo Clinic in Arizona
2017-2024

University of California, San Francisco
2021-2024

WinnMed
2019-2024

Lehigh Valley Hospital-Pocono
2024

Lehigh Valley Health Network
2024

Spectral Labs (United States)
2022-2024

Ophthalmology Associates (United States)
2005-2023

University of Minnesota
2004-2022

10.1016/s0002-9394(99)80096-8 article EN American Journal of Ophthalmology 1998-02-01

the National Institutes of Health (NIH) in Bethesda, Maryland.The conference provided an opportunity to gather a diverse group more than 200 experts from both academic ophthalmology and ophthalmic pharmaceutical industry, including laboratory researchers clinicians, discuss recent advances delivery systems that convey ocular drugs posterior segment how these might be successfully used commercial products.The two-day meeting comprised following nine sessions: (1) eye anatomy barriers drug...

10.1167/iovs.10-5392 article EN Investigative Ophthalmology & Visual Science 2010-10-28

Increasing evidence suggests a central role for mitochondrial (mt) dysfunction in age-related macular degeneration (AMD). Previous proteomic data from the retinal pigment epithelium (RPE) revealed significant changes to mt proteins, suggesting potential functional defects and damage DNA (mtDNA) with AMD progression. The present study tests hypothesis that mtDNA increases aging AMD.Genomic was isolated region of human donor RPE graded stages (Minnesota Grading System [MGS] 1-4)....

10.1167/iovs.10-5429 article EN Investigative Ophthalmology & Visual Science 2010-05-26

Macrophages can be polarized to exhibit either pro‐inflammatory M1 or pro‐angiogenic M2 phenotypes, but have high phenotypic plasticity. This pilot study investigated macrophage polarization in the macular retina and choroid of age‐related degeneration (AMD) non‐AMD subjects, as well AMD choroidal neovascular membranes (CNVM). All specimens were evaluated for routine histopathology. Quantitative real‐time polymerase chain reaction representative ( CXCL11 ) CCL22 transcripts performed on...

10.1111/j.1440-1827.2011.02695.x article EN Pathology International 2011-08-01

The incidence of cystic fibrosis-related diabetes (CFRD) and the prevalence diabetic microvascular complications were determined at University Minnesota.Cystic fibrosis patients have undergone annual oral glucose tolerance testing since 1990. Database review was performed to determine duration results urine albumin-to-creatinine ratio (U(alb:Cr)) screening dilated retinal exams. In addition, 59 individuals underwent detailed retinopathy, nephropathy, neuropathy, gastroenteropathy...

10.2337/dc06-1576 article EN Diabetes Care 2007-04-27

Age-related macular degeneration (AMD) is the leading cause of vision loss in individuals over age 65. Histopathological changes become evident retinal pigment epithelium (RPE), a monolayer that provides metabolic support for overlying photoreceptors, even at earliest stages AMD precede loss. In previous global RPE proteome analysis, were identified content several mitochondrial proteins associated with AMD. this study, subproteome mitochondria isolated from human donor graded Minnesota...

10.1167/iovs.07-1352 article EN Investigative Ophthalmology & Visual Science 2008-06-25

ObjectiveTo assess the quality, empathy, and safety of expert edited large language model (LLM), human created LLM responses to common retina patient questionsDesignRandomized, masked multicenter studyParticipantsTwenty-one questions were randomly assigned among 13 specialists. Each a response (Expert) then (ChatGPT-4)-generated that question (Expert+AI), timing themselves for both tasks. Five LLMs (ChatGPT-3.5, ChatGPT-4, Claude 2, Bing, Bard) also generated each question. The original...

10.1016/j.xops.2024.100485 article EN cc-by-nc-nd Ophthalmology Science 2024-02-06

ObjectiveTo determine the appropriateness of ophthalmology recommendations from an online chat-based artificial intelligence model to questions.Patients and MethodsCross-sectional qualitative study April 1, 2023, 30, 2023. A total 192 questions were generated spanning all ophthalmic subspecialties. Each question was posed a large language (LLM) 3 times. The responses graded by appropriate subspecialists as appropriate, inappropriate, or unreliable in 2 grading contexts. first context if...

10.1016/j.mcpdig.2024.01.003 article EN cc-by-nc-nd Mayo Clinic Proceedings Digital Health 2024-02-15

Topical cyclosporin A was used in the management of 43 patients with a variety anterior segment inflammatory disorders that had failed corticosteroid treatment. Treatment topical ranged from 1 week to months, mean treatment period 13 months. Thirty-five (81%) including high-risk keratoplasty, atopic and vernal keratoconjunctivitis, ligneous conjunctivitis, ulcerative keratitis, Mooren's ulcer beneficial result, resolution, reduction, or prevention inflammation. Six (14%) scleritis, ocular...

10.1097/00003226-199309000-00008 article EN Cornea 1993-09-01

Age-related macular degeneration (AMD) is characterized clinically by changes in the retinal pigment epithelium (RPE), formation of drusen between RPE and underlying vasculature, geographic atrophy, choroidal neovascularization. Later clinical stages are accompanied impaired central vision. A limited understanding molecular events responsible for AMD has constrained development effective treatments. proteomics approach was used to investigate mechanisms identify proteins exhibiting...

10.1167/iovs.05-0976 article EN Investigative Ophthalmology & Visual Science 2006-02-27

To compare the pharmacokinetics and tissue response between intravitreal microcannulation injections into suprachoroidal space using bevacizumab.Sixty-two pigs were studied. Either a pars plana bevacizumab or viscoelastic-enhanced microcannula injection was performed with either 1.25 mg (group 1) 3 2). In group 1, six animals euthanatized at 0.5, 7, 30, 60, 90, 120 days after (n = 36). 2, 14, 32 24). Eyes enucleated, dissected, snap-frozen, they fixed for histology. Analysis of drug levels...

10.1167/iovs.10-6291 article EN Investigative Ophthalmology & Visual Science 2011-03-30

Purpose. To evaluate a tissue sealant (autologous cryoprecipitate activated with bovine thrombin) as an adjuvant in macular hole surgery. Methods. Sixty-nine patients stage 2, 3, or 4 full-thickness were enrolled consecutively prospective pilot study. Anatomic closure of the holes single operation was primary outcome. Fifty-eight had pre- and postoperative standardized measurements including best refracted visual acuity, reading speed, contrast sensitivity. Group A (45) holes; B (13)...

10.1097/00006982-199807000-00005 article EN Retina 1998-08-01

Bacillus cereus causes a highly fulminant endophthalmitis which usually results in blindness. We previously concluded that hemolysin BL (HBL), tripartite necrotizing pore-forming toxin, is probable virulence factor because it toxic to retinal tissue vitro and vivo. also determined B. produces additional toxins might contribute virulence. Here we fractionated crude culture supernatant by anion-exchange chromatography found toxicity was associated with phosphatidylcholine-preferring...

10.1128/iai.68.9.5269-5276.2000 article EN Infection and Immunity 2000-09-01
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