Optometry Commons^™

Fluorescence Angiography With Dual Fluorescence For The Early Detection And Longitudinal Quantitation Of Vascular Leakage In Retinopathy, Benjamin Pomeroy, Alexander W Venanzi, Wei Li, Abigail S Hackam, Midhat H Abdulreda

Faculty, Staff and Students Publications

BACKGROUND: Diabetic retinopathy (DR) afflicts more than 93 million people worldwide and is a leading cause of vision loss in working adults. While DR therapies are available, early DR development may go undetected without treatment due to the lack of sufficiently sensitive tools. Therefore, early detection is critically important to enable efficient treatment before progression to vision-threatening complications. A major clinical manifestation of early DR is retinal vascular leakage that may progress from diffuse to more localized focal leakage, leading to increased retinal thickness and diabetic macular edema (DME). In preclinical research, a hallmark of DR in mouse models is …

Prescribing Patterns Of Myopia Control Contact Lenses Among Optometrists In Ireland, Michael Moore, Daniel Ian Flitcroft, James Loughman

Articles

Purpose

This retrospective analysis of electronic medical record (EMR) data investigated the prescribing patterns of soft myopia control contact lens (MCCL) treatments since their introduction in Ireland in 2017.

Methods

Anonymised EMR data were sourced from 33 optometry practices in Ireland from 2017 to 2021 to determine the number of practices prescribing MCCLs to myopic children 5–18 years old. In MCCL-prescribing practices, the proportion of contact lens wearing children fitted with MCCLs and the proportion of progressive (≤−0.25 D/year) myopic children fitted with MCCLs were determined. Logistic regression was used to determine which factors influenced the likelihood of being prescribed …

Importance Of Eye Exams As A Secondary Preventative Measure For Diabetic Retinopathy: Winning The War On Blindness, Alondra S. Arredondo, Olivia Demeyer, Rachel Louise Pfenning-Wendt, Samuel Wolfe

All Electronic Theses and Dissertations

Despite current efforts by medical professionals to reduce the prevalence of diabetic retinopathy (DR), a microvascular complication of uncontrolled diabetes, this noncommunicable disease remains the leading cause of preventable vision loss worldwide (Cheloni et al., 2019). Research estimates 90% of DR cases could be prevented if detected early through routine eye exams, yet certain social determinants of health still remain a significant barrier for many individuals to receive this care. According to Wong & Sabanayagam (2020), only 25% of DM patients in developing countries receive routine care with adequate eye screenings. The goal of this community service project was to …

The Future Of Clinical Trials Of Myopia Control, Mark A. Bullimore, Noel A. Brennan, Daniel I. Flintcroft

Articles

In the field of myopia control, effective optical or pharmaceutical therapies are now available to patients in many markets. This creates challenges for the conduct of placebo-controlled, randomised clinical trials, including ethics, recruitment, retention, selective loss of faster progressors and non-protocol treatments: 1. Ethics: It is valid to question whether withholding treatment in control subjects is ethical. 2. Recruitment: Availability of treatments is making recruitment into clinical trials more difficult. 3. Retention: If masking is not possible, parents may immediately withdraw their child if randomised to no treatment. 4. Selective loss: Withdrawal of fast progressors in the control group leading …

Imi—Management And Investigation Of High Myopia In Infants And Young Children, Daniel Ian Flitcroft, John Ainsworth, Audrey Chia, Susan Cotter, Elise Harb, Zi-Bing Jin, Caroline C. W. Klaver, Anthony T. Moore, Ken K. Nischal, Kyoko Ohno-Matsui, Evelyn A. Paysse, Michael X. Repka, Irina Y. Smirnova, Martin Snead, Virginie J. M. Verhoeven, Pavan K. Verkicharla

Articles

The purpose of this study was to evaluate the epidemiology, etiology, clinical assessment, investigation, management, and visual consequences of high myopia (≤−6 diopters [D]) in infants and young children.

Imi—Nonpathological Human Ocular Tissue Changes With Axial Myopia, Jost B. Jonus, Richard F. Spaide, Lisa A. Ostrin, Nicola S. Logan, Daniel Ian Flitcroft, Songhomitra Panda-Jonas

Articles

In axial myopia, the eye changes from a spherical shape to a prolate ellipsoid, photoreceptor, and retinal pigment epithelium cell density and total retinal thickness decrease, most marked in the retroequatorial region, followed by the equator. The choroid and sclera are thin, most markedly at the posterior pole and least markedly at the ora serrata. The sclera undergoes alterations in fibroblast activity, changes in extracellular matrix content, and remodeling. Bruch’s membrane (BM) thickness is unrelated to axial length, although the BM volume increases. In moderate myopia, the BM opening shifts, usually toward the fovea, leading to the BM overhanging into …

Imi 2023 Digest, Padmaja Sankaridurg, David A. Berntsen, Mark A. Bullimore, Pauline Cho, Daniel Ian Flitcroft, Timothy J. Gawne, Kate Gifford, Monica Jong, Lisa A. Ostrin Lisa A. Ostrin, Jacinto Santodomingo-Rubido, Christine Wildsoet, James S. Wolffsohn

Articles

Myopia is a dynamic and rapidly moving field, with ongoing research providing a better understanding of the etiology leading to novel myopia control strategies. In 2019, the International Myopia Institute (IMI) assembled and published a series of white papers across relevant topics and updated the evidence with a digest in 2021. Here, we summarize findings across key topics from the previous 2 years. Studies in animal models have continued to explore how wavelength and intensity of light influence eye growth and have examined new pharmacologic agents and scleral cross-linking as potential strategies for slowing myopia. In children, the term premyopia …

Perceptions Of Comfort And Vison In Center Distance Multifocal Contact Lenses In Non-Presbyopic Adults, D'Ajanee Smallwood

All ETDs from UAB

Purpose: The aim of this study was to assess the subjective performance of four different multifocal contact lenses (MFCLs) amongst a population of adults excluding presbyopes. Methods: Forty-three subjects were fit with up to four different lenses (Biofinity “D” MFCL, NaturalVue MFCL, MiSight 1 Day contact lens, & Intelliwave MFCL). Information about vision and comfort were gathered using subjective assessments. Pupil size data were gathered as secondary outcome measurements. Results: There were no significant differences in ghosting, haloes, and visual clarity between larger and smaller pupils. All MFCLs had reduced overall visual clarity compared to habitual correction except for Biofinity. …

High Energy Blue Light Induces Oxidative Stress And Retinal Cell Apoptosis, Jessica Malinsky

Capstone Showcase

Blue light (BL) is a high energy, short wavelength spanning 400 to 500 nm. Found in technological and environmental forms, BL has been shown to induce photochemical damage of the retina by reactive oxygen species (ROS) production. Excess ROS leads to oxidative stress, which disrupts retinal mitochondrial structure and function. As mitochondria amply occupy photoreceptors, they also contribute to oxidative stress due to their selectively significant absorption of BL at 400 to 500 nm. ROS generation that induces oxidative stress subsequently promotes retinal mitochondrial apoptosis. BL filtering and preventative mechanisms have been suggested to improve or repair BL-induced retinal damage, …

Agreement Between Lea Symbols And Patti Pics Visual Acuity In Children And Adults, Arjun Sapkotaa, Sanjeeta Sitaula, Gauri Shankar Shresthab, Niraj Dev Joshib, Bipin Koiralaa Bipin Koiralaa, Nabin Paudel

Articles

Patti Pics (PP) and Lea Symbols (LS) are commonly used by eye care practitioners worldwide. Although the relationship between the two tests is fairly well understood, the availability of different chart designs (single optotypes, multiple optotypes, multiple optotypes with crowding box) merits futher understanding. The purpose of this study is to explore the agreement between the acuity measures obtained with Patti Pics and Lea Symbols in children and adults and compare their performance with the Sloan Letter (SL) chart in adults. Methods: Monocular visual acuity was obtained from ninety-three 3 to 5-year-old children using Patti Pics and Lea Symbols. Acuities …

Systematic Review Of Clinical Practice Guidelines For Uveitis, Nima Ghadiri, Ian R. Reekie, Iris Gordon, Sare Safi, Gareth Lingham, Jennifer R. Evans, Stuart Keel

Articles

To facilitate the integration of eye care into universal health coverage, the WHO is developing a Package of Eye Care Interventions (PECI). Development of the PECI involves the identification of evidence-based interventions from relevant clinical practice guidelines (CPGs) for uveitis.

A systematic review of CPGs published on uveitis between 2010 and March 2020 was conducted. CPGs passing title and abstract and full-text screening were evaluated using the Appraisal of Guidelines for Research and Evaluation II (AGREE II) tool and data on recommended interventions extracted using a standard data extraction sheet.

Non-Invasive And Objective Tear Film Breakup Detection On Interference Color Images Using Convolutional Neural Networks, Yasushi Kikukawa, Shin Tanaka, Takuya Kosugi, Stephen C Pflugfelder

Faculty, Staff and Students Publications

PURPOSE: Dry eye disease affects hundreds of millions of people worldwide and is one of the most common causes for visits to eye care practitioners. The fluorescein tear breakup time test is currently widely used to diagnose dry eye disease, but it is an invasive and subjective method, thus resulting in variability in diagnostic results. This study aimed to develop an objective method to detect tear breakup using the convolutional neural networks on the tear film images taken by the non-invasive device KOWA DR-1α.

METHODS: The image classification models for detecting characteristics of tear film images were constructed using transfer …

Examining The Effects Of Hyperglycemia On Retinal Regeneration, Emmanuella Ec Kyllians

Theses and Dissertations--Biology

Diabetes is a disease that affects how the body processes glucose, leading to a cascade of other complications, one of which is diabetic retinopathy (DR). DR is a neurovascular disease that affects the retina and research has revealed the role of retinal neurodegeneration in its development. Animal models like zebrafish have emerged as important tools for studying the molecular and cellular mechanisms underlying DR. On the other hand, retinitis pigmentosa (RP) is a degenerative disease that involves the progressive degeneration of rods and cones, and hyperglycemia has been found to impair regeneration. Therefore, this study aims to examine the effects …

Retinal Alpha-Synuclein Accumulation Correlates With Retinal Dysfunction And Structural Thinning In The A53t Mouse Model Of Parkinson’S Disease, Katie K N Tran, Vickie H Y Wong, Anh Hoang, David I Finkelstein, Bang V Bui, Christine T O Nguyen

Faculty, Staff and Student Publications

Abnormal alpha-synuclein (α-SYN) protein deposition has long been recognized as one of the pathological hallmarks of Parkinson's disease's (PD). This study considers the potential utility of PD retinal biomarkers by investigating retinal changes in a well characterized PD model of α-SYN overexpression and how these correspond to the presence of retinal α-SYN. Transgenic A53T homozygous (HOM) mice overexpressing human α-SYN and wildtype (WT) control littermates were assessed at 4, 6, and 14  months of age (male and female,

Chatgpt: Is It Good For Our Glaucoma Patients?, Gloria Wu, David A Lee, Weichen Zhao, Adrial Wong, Sahej Sidhu

Faculty, Staff and Student Publications

Purpose: Our study investigates ChatGPT and its ability to communicate with glaucoma patients.

Methods: We inputted eight glaucoma-related questions/topics found on the American Academy of Ophthalmology (AAO)'s website into ChatGPT. We used the Flesch-Kincaid test, Gunning Fog Index, SMOG Index, and Dale-Chall readability formula to evaluate the comprehensibility of its responses for patients. ChatGPT's answers were compared with those found on the AAO's website.

Results: ChatGPT's responses required reading comprehension of a higher grade level (average = grade 12.5 ± 1.6) than that of the text on the AAO's website (average = 9.4 grade ± 3.5), (0.0384). For the eight …

Dye Coupling Of Horizontal Cells In The Primate Retina, Feng Pan, Stephen C Massey

Faculty, Staff and Student Publications

In the monkey retina, there are two distinct types of axon-bearing horizontal cells, known as H1 and H2 horizontal cells (HCs). In this study, cell bodies were prelabled using 4',6-diamidino-2-phenylindole (DAPI), and both H1 and H2 horizontal cells were filled with Neurobiotin™ to reveal their coupling, cellular details, and photoreceptor contacts. The confocal analysis of H1 and H2 HCs was used to assess the colocalization of terminal dendrites with glutamate receptors at cone pedicles. After filling H1 somas, a large coupled mosaic of H1 cells was labeled. The dendritic terminals of H1 cells contacted red/green cone pedicles, with the occasional …

Tfos Lifestyle - Evidence Quality Report: Advancing The Evaluation And Synthesis Of Research Evidence, Laura E. Downie, Alexis Ceecee Britten-Jones, Ruth E. Hogg, Isabelle Jalbert, Tianjing Li, Gareth Lingham, Su-Hsun Liu, Riaz Quereshi, Ian J. Saldanha, Sumeer Singh, Jennifer P. Craig

Articles

Evidence-based practice is a dominant paradigm in healthcare that emphasizes the importance of ensuring the translation of the best available, relevant research evidence into practice. An Evidence Quality Subcommittee was established to provide specialized methodological support and expertise to promote rigorous and evidence-based approaches for the Tear Film and Ocular Surface Society (TFOS) Lifestyle Epidemic reports. The present report describes the purpose, scope, and activity of the Evidence Quality Subcommittee in the undertaking of high-quality narrative-style literature reviews, and leading prospectively registered, reliable systematic reviews of high priority research questions, using standardized methods for each topic area report. Identification of …

Choroidal Thickness Profiles And Associated Factors In Myopic Children, Emmnuel Kobia Acquah, Daniel Ian Flitcroft, Gareth Lingham, Nabin Paudel, James Loughman

Articles

SIGNIFICANCE: This study addresses the lack of choroidal thickness (ChT) profile information available in European children and provides a baseline for further evaluation of longitudinal changes in ChT profiles in myopic children as a potential biomarker for myopia treatment and identifying children at risk of myopic progression.

PURPOSE: This study aimed to investigate ChT profiles and associated factors in myopic children.

METHODS: Baseline data of 250 myopic children aged 6 to 16 years in the Myopia Outcome Study of Atropine in Children clinical trial were analyzed. Choroidal thickness images were obtained using swept-source optical coherence tomography (DRI-OCT Triton Plus; Topcon …

Tfos Lifestyle: Impact Of The Digital Environment On The Ocular Surface, James S. Wolffsohn, Gareth Lingham, Laura E. Downie, Bykie Huntjens, Takenori Inomata, Saleel Jivraj, Emmanuel Kobia-Acquah, Alex Muntz, Karim Mohamed-Noriega, Sotiris Plainis, Michael Read, Rony R. Sayegh, Sumeer Singh, Tor P. Utheim, Jennifer P. Craig

Articles

Eye strain when performing tasks reliant on a digital environment can cause discomfort, affecting productivity and quality of life. Digital eye strain (the preferred terminology) was defined as “the development or exacerbation of recurrent ocular symptoms and/or signs related specifically to digital device screen viewing”. Digital eye strain prevalence of up to 97% has been reported, due to no previously agreed definition/diagnostic criteria and limitations of current questionnaires which fail to differentiate such symptoms from those arising from nondigital tasks. Objective signs such as blink rate or critical flicker frequency changes are not ‘diagnostic’ of digital eye strain nor validated …

Strabismus And Amblyopia In Africa – A Systematic Review And Meta-Analysis, Prince Kwaku Akowuah, Samuel Adade, Andrews Nartey, Ebenezer Owusu, Richard Donkor, Stephen Ankamah-Lomotey

Articles

The objective of this review was to estimate the prevalence of strabismus and amblyopia in Africa. A systematic online literature search was conducted for articles on strabismus and amblyopia in Africa. Meta-analysis was performed, using the Freeman-Tukey double arcsine transformation, to estimate the prevalence of strabismus and amblyopia in Africa. Subgroup analyses were conducted according to age, gender, study year, and type of amblyopia. Meta-regression was used to evaluate the influence of predetermined factors on the prevalence of amblyopia. 8 (1 population-based & 7 school-based) and 21 (3 population-based & 18 school-based) studies on strabismus and amblyopia with sample sizes …