Kristen Harris Nwanyanwu, MD, MBA, MHS
Associate Professor of Ophthalmology and Visual ScienceCards
About
Research
Publications
2024
Seeing in Color: Inclusion and Characterization of Hereditary Eye Disease in African Americans
Owete A, Ionin R, Huryn L, Cukras C, Blain D, Agather A, Hufnagel R, Brooks B, Nwanyanwu K, Zein W. Seeing in Color: Inclusion and Characterization of Hereditary Eye Disease in African Americans. Translational Vision Science & Technology 2024, 13: 4. PMID: 39226063, PMCID: PMC11373706, DOI: 10.1167/tvst.13.9.4.Peer-Reviewed Original ResearchConceptsHereditary eye diseasesEye diseaseOphthalmic genetics researchAfrican American patientsAfrican AmericansGenomic researchEra of molecular geneticsRare diseaseWeb of ScienceAmerican patientsInclusion criteriaPatientsLiterature searchInclusion of African AmericansDiverse cohortPredetermined inclusion criteriaDiseasePatient careCounseling sessionsMolecular geneticsAncestral backgroundDiverse populationsNeeds assessment and patient-guided development of a video-based diabetic retinopathy patient education tool
Ahmed O, Applebaum S, Ahmad M, Ahmed D, Juthani P, Nwanyanwu K. Needs assessment and patient-guided development of a video-based diabetic retinopathy patient education tool. Health Education Journal 2024, 83: 587-597. DOI: 10.1177/00178969241258818.Peer-Reviewed Original ResearchPatient perspectivePatients' health knowledgePost-intervention interviewsPatient education toolsAcademic medical centreSemi-structured interviewsPatient uptakeLifestyle factorsQualitative interview dataNeeds assessmentPatient educationVideo educationHealth knowledgeRetina physiciansUnique educational needsImprove accessDiabetes managementEducational materialsEducational videosPhysiciansMedical CentreDR knowledgeDR patientsEffective communicationCohort B
2023
Epidemiologic trends of domestic violence–related ocular injuries among pediatric patients: data from the Nationwide Emergency Department Sample 2008-2017
Andoh J, Miguez S, Andoh S, Mehta S, Mir T, Chen E, Jain S, Teng C, Nwanyanwu K. Epidemiologic trends of domestic violence–related ocular injuries among pediatric patients: data from the Nationwide Emergency Department Sample 2008-2017. Journal Of American Association For Pediatric Ophthalmology And Strabismus 2023, 27: 335.e1-335.e8. PMID: 37931837, PMCID: PMC10859911, DOI: 10.1016/j.jaapos.2023.09.008.Peer-Reviewed Original ResearchConceptsOcular injuriesHospital stayED encountersMedian chargePediatric emergency department patientsCommon ocular diagnosisEye/adnexaMedian hospital stayEmergency department patientsMechanism of injuryInpatient hospital stayCross-sectional studyLow socioeconomic statusLowest income quartileSpecific social determinantsPediatric patientsAnnual incidenceDepartment patientsMedicaid insuranceMedian lengthTrauma hospitalSecondary diagnosisOcular diagnosisEpidemiologic trendsPatientsFactors Associated With Visual Impairment Among Adults With a History of Criminal Justice Involvement
Andoh J, Mir T, Teng C, Wang E, Nwanyanwu K. Factors Associated With Visual Impairment Among Adults With a History of Criminal Justice Involvement. Journal Of Correctional Health Care 2023, 29: 329-337. PMID: 37733299, DOI: 10.1089/jchc.22.07.0056.Peer-Reviewed Original ResearchCriminal justice involvementVisual impairmentPopulation-based studyAfrican American raceJustice involvementChronic health conditionsCross-sectional studyFemale sexHealth characteristicsAmerican raceDrug useYounger ageOlder ageHealth equityHealth conditionsImpairmentLess educationAdultsAdult respondentsNational surveySimilar ratesLow incomeInvolvementAgePast yearDomestic Violence-Related Ocular Injuries Among Adult Patients: Data from the Nationwide Emergency Department Sample, 2008–2017
Andoh J, Mehta S, Chen E, Mir T, Nwanyanwu K, Teng C. Domestic Violence-Related Ocular Injuries Among Adult Patients: Data from the Nationwide Emergency Department Sample, 2008–2017. Ophthalmic Epidemiology 2023, 31: 169-177. PMID: 37345877, PMCID: PMC10739625, DOI: 10.1080/09286586.2023.2222792.Peer-Reviewed Original ResearchNationwide Emergency Department SampleCommon ocular injuriesEye/adnexaOcular injuriesED visitsAdult emergency department patientsMost ED visitsMean hospital stayHospital admission ratesEmergency department patientsHospital-level variablesAnnual incidence rateEmergency Department SampleCross-sectional studyLowest income quartileHospital stayAdult patientsDepartment patientsHospital admissionOpen globeAdmission ratesIncidence rateRegional hospitalMean costOrbital fracturesDisparities in Eye Care Access and Utilization: A Narrative Review
Andoh J, Ezekwesili A, Nwanyanwu K, Elam A. Disparities in Eye Care Access and Utilization: A Narrative Review. Annual Review Of Vision Science 2023, 9: 15-37. PMID: 37254050, DOI: 10.1146/annurev-vision-112122-020934.Peer-Reviewed Original Research
2022
Data Sciences and Visual Health Disparities
Legault G, Nwanyanwu K, Baxter S. Data Sciences and Visual Health Disparities. Ophthalmology 2022, 129: 1085-1086. PMID: 36058740, DOI: 10.1016/j.ophtha.2022.06.032.Peer-Reviewed Original Research
2020
Ophthalmic Medication Expenditures and Out-of-Pocket Spending An Analysis of United States Prescriptions from 2007 through 2016
Chen EM, Kombo N, Teng CC, Mruthyunjaya P, Nwanyanwu K, Parikh R. Ophthalmic Medication Expenditures and Out-of-Pocket Spending An Analysis of United States Prescriptions from 2007 through 2016. Ophthalmology 2020, 127: 1292-1302. PMID: 32359935, PMCID: PMC7508869, DOI: 10.1016/j.ophtha.2020.04.037.Peer-Reviewed Original ResearchConceptsOphthalmic medicationsMedication expendituresOOP expenditureLongitudinal cohort studyOverall drug expendituresUnited States populationPrescription drug spendingGlaucoma medicationsCohort studyMedication useDry eyePrescription usePrescription expendituresPrescription medicationsOOP expensesMedicationsCopayment assistancePocket expenditureOOP spendingDrug expendituresPocket spendingDrug spendingIndirect costsMEPS participantsLinear regressionNeighborhood Deprivation and Adherence to Initial Diabetic Retinopathy Screening
Yusuf R, Chen EM, Nwanyanwu K, Richards B. Neighborhood Deprivation and Adherence to Initial Diabetic Retinopathy Screening. Ophthalmology Retina 2020, 4: 550-552. PMID: 32139294, PMCID: PMC8281953, DOI: 10.1016/j.oret.2020.01.016.Peer-Reviewed Original Research
2019
Barriers to and Facilitators of Diabetic Retinopathy Screening Utilization in a High-Risk Population
Fairless E, Nwanyanwu K. Barriers to and Facilitators of Diabetic Retinopathy Screening Utilization in a High-Risk Population. Journal Of Racial And Ethnic Health Disparities 2019, 6: 1244-1249. PMID: 31463812, PMCID: PMC6880869, DOI: 10.1007/s40615-019-00627-3.Peer-Reviewed Original ResearchConceptsHigh-risk populationEye examDiabetic retinopathyVision lossQualified community health centersCommunity health centersLow socioeconomic statusUse of screeningBackgroundDiabetic retinopathyMedian ageEye careHealth centersClinic experienceDiabetesPatientsVision statusRetinopathyConclusionsThe factorsMethodsQualitative interviewsVisual symptomsSocioeconomic statusHealth insuranceImportant facilitatorsExamParticipants
Clinical Trials
Current Trials
Sight-saving Engagement and Evaluation in New Haven (SEEN) Program
HIC ID2000031731RolePrincipal InvestigatorPrimary Completion Date12/31/2022Recruiting Participants
Academic Achievements & Community Involvement
Clinical Care
Overview
Kristen Nwanyanwu, MD, is an ophthalmologist who specializes in vitreoretinal surgery, which treats the vitreous, or gel-like substance that helps the eye maintain its round shape. She often treats patients with eye problems related to trauma, diabetes and age-related macular degeneration.
“Eye surgery is very delicate surgery,” Dr. Nwanyanwu says. “I often describe the surgeries I do as separating tissue paper underwater with tweezers, so people can get an idea of how fine my movements need to be. We take instruments that are the size of needles—and lasers, and other things—and use them to manipulate the tissue.”
Dr. Nwanyanwu knew she wanted to be a doctor as a child. As a teenager, she helped her brother manage his care after he developed a brain tumor. In medical school, she saw the many ways eye problems can impact a patient’s life. “It could be something as small as, ‘When I'm reading, I miss a few letters,’" she says, explaining that this is a symptom of a macular hole that actually does take a small piece out of the central vision. “Or it could be something as large as, “’I used to be able to see, then two days ago I saw flashing lights and now I don't see anything.’" The latter can be retinal detachment, meaning the lining or film in the retina that has come down like wallpaper and is no longer sending visual information to the brain. Dr. Nwanyanwu now performs surgery for both of these conditions.
An assistant professor of ophthalmology and visual science at Yale School of Medicine, Dr. Nwanyanwu enjoys working the Yale Eye Center because she has quick access to colleagues who often provide valuable input for her cases. “And there is a warmth here,” she says. “We all work together very well. I know the glaucoma specialists, the ocular oncologists, the uveitis specialist, the cornea team. When I’m talking to a patient about what's happening with their eye, I might go out into the hall and see four different kinds of eye doctors. We also meet regularly to talk about our complex cases. I think that is the best way to do things, and it leads to high quality care.”
Clinical Specialties
Fact Sheets
Retinal Detachment
Learn More on Yale MedicineMacular Degeneration
Learn More on Yale MedicineType 2 Diabetes: Symptoms and Treatments
Learn More on Yale MedicineDiabetes: Symptoms, Causes, and Treatments
Learn More on Yale Medicine
Board Certifications
Ophthalmology
- Certification Organization
- AB of Ophthalmology
- Original Certification Date
- 2014
Yale Medicine News
News & Links
News
- May 07, 2024
Congratulations to Dr. Kristen Nwanyanwu: Recipient of the William R. Orthwein, Jr. '38 Yale Scholar Award!
- August 29, 2023
The Task Force and Sub-Task Forces on Disparities in Eye Care Recognized for its Extraordinary Work in Health Disparities, Deep Contributions by Dr. Kristen Nwanyanwu
- January 03, 2023
Dr. Kristen Nwanyanwu’s Project Submission to the YCCI Community Engaged Research Pilot Program Entitled “Development of a Community Responsive Digital Health Tool for Diabetic Retinopathy Screening” - Selected for Funding
- July 11, 2022
Kristen Nwanyanwu, MD, MBA, MHS Promoted to Associate Professor of Ophthalmology & Visual Science