Laboratory News

March 2024

JOURNAL ARTICLE ACCEPTED: D Johnson, N Doble and SS Choi, “Quantitative Analysis of the Vasculature and Cone Photoreceptors in Subjects with Diabetes without Diabetic Retinopathy” Accepted to Current Eye Research.

Danae’s PhD work examining OCT-A, AO-OCT-SLO imaging in prediabetic subjects.

Feb 2024

JOURNAL ARTICLE PUBLISHED: Lee, SS Choi, RK Meleppat, RJ Zawadzki, N Doble, “High-speed, phase contrast retinal and blood flow imaging using an adaptive optics partially confocal multi-line ophthalmoscope” Biomed. Opt. Express, 15(3), 1815-1830 (2024).

Details our 500 Hz line scanning ophthalmoscope using phase contrast imaging that provides excellent visualization of retinal blood flow.

Jan 2024

ConfLogo-Desktop

Conference Presentation
27 January 2024 • 8:00 AM – 8:15 AM PST | Moscone Center, Room 156 (Upper Mezzanine South)
Conference Presentation
28 January 2024 • 5:30 PM – 7:00 PM PST | Moscone Center, Room 2003 (Level 2 West)

December 2024

JOURNAL ARTICLE PUBLISHED: N Doble, EM Wells-Gray, SS Choi. “Foveal Cone Loss in Tamoxifen Maculopathy” Medical Case Reports. 17(464) (2023).

Details observed foveal cone loss in a patient on tamoxifen treatment for breast cancer.

Sept 2023

LAB PERSONNEL: Dr. Swati Padhee joins the group as a postdoctoral fellow to further our work using artificial intelligence. Funded through our recent NIH P30 Core Grant

June 2023

JOURNAL ARTICLE ACCEPTED FOR PUBLICATION: N Doble, EM Wells-Gray, M Ohr, SS Choi, “High Resolution Imaging of the Outer Retina in Type 2 Acute Macular Neuroretinopathy” Retinal Cases and Brief Reports

May 2023

NEW LAB MEMBER: Erin Hudson joins the lab as an OD/MS student

NEW LAB MEMBER: David Stout joins the lab as an OD/MS student

April 2023

SEMINAR: Nathan recently gave a presentation entitled “Visualizing the Human Retina with Adaptive Optics Enabled Imaging Modalities” in the Department of Ophthalmology at Indiana University.

4 conference presentations at the Annual ARVO Meeting in New Orleans

N Doble, EM Wells-Gray, M Ohr, SS Choi, “Adaptive Optics OCT Imaging in Type 2 Acute Macular Neuroretinopathy”, Investigative Ophthalmology & Visual Science, New Orleans, May 2023.

S Lee, SS Choi, RK Meleppat, RJ Zawadzki, N Doble, “High-speed adaptive optics multi-detection mode ophthalmoscope using a digital micromirror device” Investigative Ophthalmology & Visual Science, New Orleans, May 2023.

SS Choi, E Ivey, S Araujo-Hernandez, N Doble, In vivo imaging of cone photoreceptors from both central and periphery” Investigative Ophthalmology & Visual Science, New Orleans, May 2023.

RK Meleppat, E Pijewska, S Lee, D Valente Dos Santos, RS Jonnal, N Doble, RJ Zawadzki, Progress on a full-field swept-source optical coherence tomography (FF-SS-OCT) system for mouse optoretinography (ORG)” Investigative Ophthalmology & Visual Science, New Orleans, May 2023.

January 2023

CONFERENCE: Four abstracts accepted to ARVO 2023. Nathan, Stacey, Soohyun and our collaborator at UC Davis, Ratheesh will all be presenting. See you in New Orleans, April 23-27th!

 

 

https://www.arvo.org/annual-meeting/registration2/registration/

 

CONFERENCE: Back from San Francisco after attending Photonics West – excellent conference. Soohyun and Ratheesh gave great presentations.

ConfLogo-Desktop

Conference Presentation
28 January 2023 • 3:45 PM – 4:00 PM PST | Moscone Center, 
Conference Presentation
29 January 2023 • 5:30 PM – 7:00 PM PST | Moscone Center

a

December 2022

JOURNAL ARTICLE PUBLISHED: Lee, S. S. Choi, R. K. Meleppat, R. J. Zawadzki, N. Doble, “Programmable, high-speed, adaptive optics partially confocal ophthalmoscope using a digital micromirror device”, Opt. Lett. 48(3), 791-794 (2023).

Details the performance of a 250 Hz frame rate ophthalmoscope, much faster the single scanning spot approaches.

September 2022

JOURNAL ARTICLE PUBLISHED: Mengxi had his manuscript accepted.

M. Zhou, N Doble, SS Choi, T Jin, X. Xu, S. Parthasarathy, R Ramnath, “Using Deep Learning for Automated Identification of Cone and Rod Photoreceptors from Adaptive Optics Imaging of the Human Retina” Biomedical Optics Express. 13(10): 5082-5097 (2022). For the feature issue: ‘Adaptive Optics for Biomedical Applications’.

August 2022

JOURNAL ARTICLE PUBLISHED: Carol’s paper is finally published on our laser damage work! C Vitellas, N Doble, EM Wells-Gray, N Challa, F Davidorf, SS. Choi, “Cone Photoreceptor Integrity assessed with Adaptive Optics Imaging after Laser-Pointer-Induced Retinal Injury” Retinal Cases and Brief Reports. 16(5):586-592, (2022).

June 2022

GRANT: The National Eye Institute (NEI) awarded OSU a $3 Million Core grant to support vision science research at the University. Nathan is Director of Core C – Image Analysis and Data Science

Jan 2022

CONFERENCE PRESENTATION: RJ Zawadzki, D Valente, RK Meleppat, Vienola, SJ Karlen, P Zhang, RS. Jonnal, N Doble. “Full Field Swept Source Optical Coherence Tomography (FF-SS-OCT) system for in vivo evaluation of light evoked activation of photoreceptors (optoretinography) in mice” Proc. SPIE PC11941, Ophthalmic Technologies XXXII, March 7th, 2022.

October 2020

GRANT: Stacey awarded the 2020 Allergan Foundation Grant in glaucoma from the American Academy of Optometry (AAO).

https://www.aaopt.org/home/aaof/news-detail/2020/10/01/american-academy-of-optometry-foundation-is-pleased-to-announce-the-2020-2021allergan-foundation-research-grant-recipients

September 2020

News article from a recent journal publication from our lab highlighting the potential dangers of low power laser pointers to the human eye.

https://news.osu.edu/pet-laser-pointers-have-enough-power-to-blast-away-cells-in-the-back-of-the-eye/

August 2020

GRANT: Nathan awarded a $2.3 million R01 grant from the National Eye Institute to develop the next generation of OCT instrumentation for functional measurements on a single retinal neuron. The grant is a collaboration with the University of California Davis.

LAB PERSONNEL: Dr. Danae Johnson joins the lab as a PhD student.

July 2020

LAB PERSONNEL: Sadhvika Venkat joins the lab as an OD/MS student. Welcome!

June 2020

GRANT: Nathan along with collaborators from the Department of Engineering and Computer Science were awarded a one year grant from the OSU Translational Data Analytics Institute to apply artificial intelligence in the analysis of retinal images

PAPER: Carol’s paper accepted to Retinal Cases and Brief Reports.

Cone Photoreceptor Integrity assessed with Adaptive Optics Imaging after Laser-Pointer-Induced Retinal Injury

May 2020

LAB PERSONNEL: Dr. Daniel Mittelstaedt joins the group as a postdoctoral fellow to further the work imaging inner retinal structure.

January 2020

GRANT: Stacey and Nathan along with collaborators in the OSU Department of Neurology were awarded a one year grant to examine structural changes in the retina of retired National Football League (NFL) players suffering with chronic traumatic encephalopathy

December 2019

GRANT: Nathan awarded a two year grant from the Ann Ellis Fund of the Columbus Foundation to use adaptive optics to study changes in the inner nuclear layer of patients with glaucoma

September 2019

Congratulations to Emma on her travel grant from the American Academy of Optometry Foundation

August 2019

LAB PERSONNEL: Sophie Araujo-Hernandez joins the lab as an OD/MS student. Welcome!

May 2019

Congratulations to 1st year medical students Nayanika Challa and Carol Vitellas winners of Ohio State University Medical Center Student Research Summer Scholarships. Will be working with us over the summer!

Also welcome to OSU undergraduates Emily Demmert, Olivia Severyn, Erin Ivey. They will be helping on our AAO myopia project

LAB PERSONNEL: Christi Locke successfully defends her MS thesis entitled “In vivo cone photoreceptor imaging in adolescents as a measure of retinal stretch during refractive error development”. Up next, a one year residency at Cincinnati Children’s Hospital in pediatric optometry

CONFERENCE PRESENTATION: Off to Vancouver!   Stacey and Elaine presenting at ARVO

Adaptive Optics OCT-Based Drusen Grading for Assessing Severity of Dry Age-Related Macular Degeneration

Volumetric Imaging of Retinal Ganglion Cells and Inner Retinal Microstructure using a Combined AO-OCT-SLO

March 2019

PATENT: N Doble, L Blanco, JL Codona, HG Morris.  Rapid Measurement of Individual Cone Photoreceptor Pointing for Evaluation of Eye Health using Focus Diversity. US 10,231,618 B2

February 2019

CONFERENCE PRESENTATION: Elaine presents at Photonics West in San Francisco.

Photoreceptor identification and quantitative analysis for the detection of retinal disease using AO-OCT imaging

January 2019

GRANT: UnEYEted Grant to study the inner retina using AO-OCT. Collaboration with OSU Ophthalmology

December 2018

PAPER: Elaine’s paper published.

Structural Integrity of Individual Cone Photoreceptors after Short-Wavelength Subthreshold Micropulse Laser Therapy for Diabetic Macular Edema. Ophthalmic Surgical Lasers and Imaging

November 2018

PAPER: Some of the first images of individual neurons in the inner retina Inner. Nuclear Layer Changes in Primary Open Angle Glaucoma Revealed through Adaptive Optics Optical Coherence Tomography. Journal of Glaucoma

CONFERENCE PRESENTATION: Stacey presents at the American Academy of Optometry Annual Meeting in San Antonio.

Retinal Imaging with an Adaptive Optics-Optical Coherence Tomography- Scanning Laser Ophthalmoscope (AO-OCT-SLO) and Its Clinical Application

CONFERENCE PRESENTATION: Christi presents at the same meeting.

In vivo Cone Photoreceptor Imaging in Adolescents as a Measure of Retinal Stretch during Refractive Error Development

October 2018

NEW TEACHING COURSE: High Resolution Imaging of the Eye using Adaptive Optics

CONFERENCE PRESENTATION: Stacey presents at the American Academy of Ophthalmology Annual Meeting in Chicago

Retinal Imaging with an Adaptive Optics-Optical Coherence Tomography- Scanning Laser Ophthalmoscope (AO-OCT-SLO) and Its Clinical Application

May 2018

LAB PERSONNEL: Dr. Shaojie Men joins as a postdoctoral fellow from the University of Seattle. Welcome!

LAB PERSONNEL: Emma Thompson joins the lab as an OD/MS student – co-supervised with Dr. Ooi

April 2018

CONFERENCE PRESENTATION: Nathan presents some of our first results imaging the inner retina in-vivo.

Imaging the Invisible: Imaging Individual Retinal Ganglion Cells in the Living Human Eye,” Prevent Blindness Ohio: Aging Eye Summit

PERSONNEL: Christi Locke receives Wallman scholarship

March 2018

PAPER: Elaine’s paper on our combined AO-OCT-SLO system published.

Volumetric imaging of rod and cone photoreceptor structure with a combined adaptive optics-optical coherence tomography-scanning laser ophthalmoscope. Journal of Biomedical Optics

January 2018

GRANT: Stacey awarded grant from the American Academy of Optometry (AAO) to study the Outer Retinal Changes in the Myopic Children

December 2017

GRANT: Nathan awarded a grant from the Ann Ellis Fund of the Columbus Foundation to further develop optical techniques to image the retinal ganglion cells in-vivo. Important in the study of glaucoma

CONFERENCE PRESENTATION: Nathan presents at the local Optometric Educators Inc. (OEI) Annual Winter Continuing Education Conference at Lewis Center

Imaging Retinal Disease with Adaptive Optics Optical Coherence Tomography

July 2017

GRANT: Stacey and Nathan are co-investigators on and OSU grant to study the Retinal changes in traumatic optic neuropathy. Collaboration with BME faculty, Matthew Reilly

June 2017

PERSONNEL: Christi Locke receives Wallman scholarship.

May 2017

CONFERENCE PRESENTATION: Off to Baltimore!   Stacey and Elaine presenting at ARVO

Retinal Integrity after Short Wavelength Subthreshold Micropulse Laser Therapy for Diabetic Macular Edema

The effect of moderate myopia on rod and cone photoreceptor densities in human eyes using AO-SLO imaging

BOOK CHAPTER: Nathan authors the chapter “Adaptive Optics and OCT” for the book “Handbook of Visual Optics” Taylor and Francis Books.

LAB PERSONNEL: Winston Posvar successfully defends his MS thesis entitled “Variation of Ocular Parameters in Young Normal Eyes

March 2017

PAPER: Stacey and Nathan are co-authors on Vision Science and Adaptive Optics: The State of the Field published in Vision Research

February 2017

CONFERENCE PRESENTATION: Elaine presents at Photonics West in San Francisco.

Investigation of retinal microstructure in healthy eyes and dry age-related macular degeneration using a combined AO-OCT-SLO system

 August 2016

PAPER: Elaine’s paper on imaging the mid-periphery with AO is published in Eye.

Variation in rod and cone density from the fovea to the mid-periphery in healthy human retinas using adaptive optics scanning laser ophthalmoscopy

July 2016

CONFERENCE PRESENTATION: Nathan presents Integrity of Individual Cone Photoreceptors over Drusen in Early Stage Dry AMD at the Optometric Educators Inc. (OEI) Annual Summer Continuing Education Conference in Dublin, OH

June 2016

LAB PERSONNEL: Dr. Hugh Morris leaves to take teaching position in Columbus

May 2016

CONFERENCE PRESENTATION: Off to Seattle!    Stacey, Nathan, Elaine and Hugh present at ARVO

In Vivo Visualization of Cone and Rod Photoreceptors in the Healthy Human Retina using a combined AO-OCT-SLO

Integrity of individual cone photoreceptors over drusen in early stage dry AMD

Is the retina affected in chronic form of mild traumatic brain injury with binocular vision problems?

Factors Affecting the Magnitude of Cone Directionality in the Stiles-Crawford Effect of the First Kind

LAB PERSONNEL: Stacey elected to the ARVO Annual Meeting Program Committee, Multidisciplinary Ophthalmic Imaging Cross-sectional Group (MOI) for a 3 year term

LAB PERSONNEL: Christi Locke joins the lab as an OD/MS student

December 2015

PAPER: Hugh’s work on the SCE in the parafovea is published in Vision Research.

Directionality of Individual Cone Photoreceptors in the Parafoveal Region Vision Research

October 2015

CONFERENCE PRESENTATION: Do you know the way to San Jose? Nathan has an invited talks at the Optical Society of America (OSA) Frontiers in Optics APS/DLS

Retinal Imaging and Cone Pointing Measurements in the Living Chick Eye

Modeling High-Resolution SLO and OCT Retinal Imaging using Backscattering of Light from Elementary Sources

September 2015

PAPER: Novel method to measure the SCE in human eyes

Rapid measurement of individual cone photoreceptor pointing using focus diversity Optics Letters

May 2015

CONFERENCE PRESENTATION: Elaine is off to Denver for ARVO

Characterization of Human Photoreceptor Packing Arrangement as a Function of Retinal Eccentricity using an Adaptive Optics Scanning Laser Ophthalmoscope (AO-SLO)

April 2015

LECTURE: Off to see the Hoosiers. Nathan to give presentation at the School of Optometry, Indiana University.

March 2015

PAPER: In conjunction with our University of Arizona collaborator, Dr. John Codona. Co-phasing the James Webb space telescope.

James Webb Space Telescope Segment Phasing using Differential Optical Transfer Functions. Journal of Astronomical Telescopes, Instruments, and Systems

Made the cover as well!!

February 2015

PAPER: Maria’s MS work measuring cone properties in the chick eye is out

Measurement of the Photoreceptor Pointing in the Living Chick Eye. Vision Research

CONFERENCE PRESENTATION: Elaine is off to San Francisco for Photonics West

Performance of a combined optical coherence tomography and scanning laser ophthalmoscope with adaptive optics for human retinal imaging applications

October 2014

LAB PERSONNEL: Dr. Hugh Morris joins as a postdoctoral fellow from OSU BME Dept. Welcome!

July 2014

CONFERENCE PRESENTATION: Nathan presents High Resolution Retinal Imaging,” at the Optometric Educators Inc. (OEI) Annual Summer Continuing Education Conference , Dublin, OH

LAB PERSONNEL: Postdoc Dr. Leonardo Blanco off to the French National Center for Scientific Research (CNRS)

May 2014

CONFERENCE PRESENTATION: Off to Orlando for ARVO

Rapid Measurement of Cone Photoreceptor Pointing using Focus Diversity

In-vivo, Imaging of Human Cone Photoreceptors without the Use of Adaptive Optics

LAB PERSONNEL: Winston Posvar joins the lab as a combined OD/MS student

October 2013

CONFERENCE PRESENTATION: Lindsey and Leo present at the Academy of Optometry meeting in Seattle

Optical Waveguide Properties of Individual Cone Photoreceptors at Various Retinal Eccentricities

Cone Density and Packing Characteristics in Treated Amblyopic Eyes

August 2013

LAB PERSONNEL: Dr. Elaine Wells Gray joins as a postdoctoral fellow from the University of Oregon. Welcome!

July 2013

MAJOR NEWS: Laboratory moving from Boston to the College of Optometry at the Ohio State University

June 2013

LAB PERSONNEL: Dr. Susanna Finn off to take a Research Scientist position at u Mass Lowell

May 2013

CONFERENCE PRESENTATION: In Seattle for the ARVO Annual Meeting, several presentations

Photoreceptor Pointing as a Function of Retinal Eccentricity in Normal Human Eyes

Measurement of the Photoreceptor Pointing in the Living Chick Eye

AO-OCT Retinal Imaging with 163-Segment Deformable Mirror

CONFERENCE PRESENTATION: OD/MS student Jennifer Choi to present at the ARVO meeting in Fort Lauderdale

Future Insights on an Ocular Hypertension Model in the White Leghorn Chicken

LAB PERSONNEL: Jennifer Choi successfully defends her MS thesis entitled “Age-related changes of ocular dimensions in white leghorn chicken with additional insights on an ocular hypertension model in the chicken

LAB PERSONNEL: Maria Walker successfully defends her MS thesis entitled “Measurement of the Photoreceptor Pointing in the Living Chick Eye”. Currently an Assistant Clinical Professor at the University of Houston College of Optometry

February 2013

CONFERENCE PRESENTATION: Cherry and John give a presentation at Photonics West

Characterization of a MEMs deformable mirror by far field intensity evaluation

Volumetric imaging of the intraocular propagation medium using differential OTF wavefront sensing

LAB PERSONNEL: Dr. Leonardo Blanco joins as a postdoctoral fellow from ONERA and the Observatoire de Paris. Welcome!

LAB PERSONNEL: Dr. Cherry Greiner off to take position as a Senior Research Associate at InfraReDx

January 2013

PAPER: Clinical Applications of High Resolution In-Vivo Retinal Imaging. Journal of Ophthalmology. Editorial

PAPER: Photoreceptor Imaging. Ophthalmology.

October 2012

CONFERENCE PRESENTATION: Lindsey to present at the Academy of Optometry meeting in Phoenix

Inner retinal characteristics in treated amblyopic eyes

September 2012

LAB PERSONNEL: Kenneth Headington awarded the 2012 Neumueller Award from the American Academy of Optometry (AAO) for his MS research

July 2012

CONFERENCE PRESENTATION: Collaborator Dr. Codona gives presentation at “Adaptive Optics Systems III” SPIE in Amsterdam, Netherlands

Experimental evaluation of differential OTF (dOTF) wavefront sensing

June 2012

LAB PERSONNEL: Dr. Fuensanta Vera Diaz to join the faculty at the New England College of Optometry. Congratulations!

May 2012

BOOK CHAPTER: Nathan authors the chapters “MEMS Adaptive Optics” for the book “Encyclopedia of Nanotechnology” through Springer Science + Business Media

CONFERENCE PRESENTATION: OD/MS student Jennifer Choi to present at the ARVO meeting in Fort Lauderdale

Age-Related Changes in Ocular Parameters in White Leghorn Chickens

LAB PERSONNEL: Kenneth Headington successfully defends his MS thesis entitled “High Resolution Imaging of the Chick Retina using Adaptive Optics

January 2012

BOOK CHAPTER: Fuensanta and Nathan author the book chapter “The Human Eye and Adaptive Optics” for the book “Topics in Adaptive Optics” Intech Publishing

BOOK CHAPTER: Cherry and Stacey author the book chapter “Cellular Level Imaging of the Retina using Optical Coherence Tomography”, for the book “Optical Coherence Tomography” Intech Publishing

November 2011

LAB PERSONNEL: Dr. Susanna Finn joins as a postdoctoral fellow from Boston University. Welcome!

October 2011

PAPER: Ken’s MS research work imaging the photoreceptors in the chick eye is published in Current Eye Research

Single Cell, In vivo Imaging of the Chick Retina with Adaptive Optics

August 2011

LAB PERSONNEL: Dr. Yicong Zhou to take faculty position at the University of Macau

May 2011

CONFERENCE PRESENTATION: Lindsey to present at ARVO meeting in Phoenix

Investigation of Outer Retinal Differences In Amblyopic Eyes

March 2011

PAPER: Stacey a co-author on an invited paper to Eye.

Outer retinal abnormalities associated with inner retinal pathology in non-glaucomatous and glaucomatous optic neuropathies

February 2011

LECTURE: Nathan to present at the Massachusetts Society of Optometrists (MSO), Southborough, MA

Application of Adaptive Optics to Retinal Imaging and Vision Testing

LAB PERSONNEL: Dr. Cherry Greiner joins as a postdoctoral fellow from Tufts University. Welcome!

January 2011

PAPER: Our lab publishes the images of the rod receptors in the living human eye!

In vivo imaging of the human rod photoreceptor mosaic. Optics Letters

PAPER: Photoreceptor changes in glaucoma

Evidence of outer retinal changes in glaucoma patients as revealed by ultrahigh-resolution in vivo retinal imaging. British Journal of Ophthalmology

PAPER: Stacey is a co-author on a paper describing OCT imaging of epi-retinal membranes published in Eye

Fourier-domain optical coherence tomography of eyes with idiopathic epi-retinal membrane: correlation between macular morphology and visual function

October 2010

GRANT: Stacey awarded 4 year grant from the US Department of Defense (US Army) to use high resolution imaging of the human retina as a direct, non-invasive biomarker for blast traumatic brain injury (TBI)

Ultrahigh Resolution Retinal Imaging with Adaptive Optics for Early Diagnosis of Traumatic Brain Injury

September 2010

LECTURE: Off to MIT. Nathan to present at the Media Lab

Adaptive Optics for High Resolution Retinal Imaging

LAB PERSONNEL: Dr. Fuensanta Vera Diaz joins the lab as an assistant research professor Sept 2010 – Jun 2012

PAPER: The oblique effect has an optical component; orientation-specific contrast thresholds after correction of high-order aberrations. Journal of Vision

August 2010

PAPER: High-resolution Fourier-domain optical coherence tomography of choroidal neovascular membranes associated with age-related macular degeneration. Investigative Ophthalmolology and Visual Science

July 2010

GRANT: Nathan awarded 5 year RO1 grant from the National Institute of Health – National Eye Institute (NEI) to develop optical techniques to image the rod photoreceptors in vivo

In-vivo, High Contrast Imaging of the Human Rod Photoreceptor Mosaic

June 2010

PAPER: Stacey is a co-author of a paper describing the retinal effects of tamoxifen treatment for breast cancer. Published in Retinal Cases & Brief Reports.

Maculopathy diagnosed with high-resolution Fourier-domain optical coherence tomography in eyes with previously unexplained visual loss

May 2010

CONFERENCE PRESENTATION: OD/MS student Ken Headington to present at the ARVO meeting in Fort Lauderdale.

Single Cell, In-Vivo Imaging of Chick Retina with Adaptive Optics

CONFERENCE PRESENTATION: Stacey to present at the ARVO meeting in Fort Lauderdale.

A Close-Up Investigation of Cone Photoreceptors in Retinal and Optic Nerve Diseases as Revealed by Adaptive Optics – OCT Images

March 2010

PAPER: Microstructural abnormalities revealed by high resolution imaging systems in central macular arteriovenous malformation. Ophthalmic Surgery, Lasers & Imaging

Jan 2010

LAB PERSONNEL: Maria Walker joins the lab as an OD/MS student