Optometry Commons^™

Chromatic Sensitivity: A New Insight Into Color Discrimination, Micah Jason Kinney

All ETDs from UAB

Color discrimination varies between individuals even in the absence of a congenital color vision defect. Attempts to explain this variation have shown no link to macular pigment optical density, L:M cone ratios, non-verbal IQ, or female carriers of color vision deficiencies. This study examined individuals’ relative luminance and color-opponent systems sensitivity to their Farnsworth-Munsell 100-Hue (FM-100) color discrimination ability. Thirty normal color vision subjects performed FM-100 and increment threshold testing for white, blue, green and red on a 150 cd/m2 white background. White increment thresholds were compared to colored increment thresholds to produce a luminance to color-opponent system sensitivity ratio …

Health Professions Division 2016-2017 Catalog, Nova Southeastern University

Health Professions Divisions Course Catalogs and Course Descriptions

No abstract provided.

College Of Optometry Overview 2016, Nova Southeastern University

Health Professions Divisions Course Catalogs and Course Descriptions

No abstract provided.

Preparatory Optometry Program 2016, Nova Southeastern University

Health Professions Divisions Course Catalogs and Course Descriptions

No abstract provided.

Elementary Photoreceptor Signaling In Human Vision, Kady Scarlett Bruce

All ETDs from UAB

To perceive a spot of light at photopic threshold, a minimum number of photons must be absorbed by cone photoreceptors. While many factors affecting psychophysical threshold have been studied, few have been examined at the single-cone level. Here we reveal how variation in synaptic weighting and signal integration among cones in the human retina occurs in vivo. Using an adaptive optics scanning laser ophthalmoscope (AOSLO) equipped with stimulation capabilities, we targeted cone-sized stimuli to single cones. Perceptual increment thresholds were measured from individual cones and cone pairs in 7 subjects using a Bayesian-based staircase method of threshold estimation. In 42 …

Histopathology And Image Validation Of Outer Retinal Tubulations In Age-Related Macular Degeneration, Katie M. Litts

All ETDs from UAB

High-resolution imaging of the retina using spectral domain optical coherence tomography (SD-OCT) and adaptive optics scanning laser ophthalmoscopy (AOSLO) is revealing new information about photoreceptor degeneration in age-related macular degeneration (AMD) and other diseases impacting rod and cone photoreceptors. By SD-OCT, the hyperreflective outer retinal bands are visible due to the precise vertical compartmentalization and horizontal alignment of outer retinal cells and tissues (Müller cells, photoreceptors, RPE, and Bruch’s membrane). Validating these bands with normal eyes is difficult because the outer retina is very delicate making accurate histology requiring attached retina and vertically aligned photoreceptors challenging. Conversely, the bands are …

Conjunctival Gene Expression And Tear Biomarkers In Atopic And Non-Atopic Keratoconus Patients Relative To Matching Controls, Erika Marie Morrow

All ETDs from UAB

Purpose: The aim of this study was to adapt conjunctival impression cytology (CIC) and RNA isolation to genetic analysis of the conjunctival surface of keratoconus (KC) patients with (AKC) and without atopic disease (AD) and with normal contact lens wearers (NCL). If RNA quantity and quality was sufficient, full transcriptome analysis would be conducted using RNA-Seq, rather than the more limited microarray approach. Methods: CIC samples were the ocular surface of 30 participants from four groups: 1) KC, 2) AKC, 3) AD, and 4) NCL. Several extraction and purification methods were investigated, including density gradient centrifugation, precipitation, conventional pelleting, and …

Physical Activity For Adults With Visual Impairments: Impact Of Socio-Demographic Factors, Justin A. Haegele, Xihe Zhu, Jihyun Lee, Lauren J. Lieberman

Human Movement Sciences Faculty Publications

Little is known about what factors influence physical activity participation for adult-aged individuals with visual impairments. Therefore, the purpose of this study was to explore the impact of socio-demographic factors on the physical activity participation of adults with visual impairments. The international physical activity questionnaire-short form and a socio-demographic factor questionnaire were distributed to individuals with visual impairments. A total of 176 adults (M_age = 47.04, 52.8% female) completed the questionnaires. Physical activity and socio-demographic variables were analyzed descriptively and relationships were explored using correlation analysis and multiple regression analysis. On average, participants reported 413.79 minutes of moderate-to-vigorous physical …

Evidence For Using Immunosuppressive Treatments When Treating Idiopathic Non-Infectious Uveitis: A Systematic Review And Meta-Analysis, Hargurinder Singh

Electronic Thesis and Dissertation Repository

Idiopathic non-infectious uveitis is the spontaneous inflammation of the eye, which can lead to blindness if not treated correctly. Due to long-term side effects of corticosteroids, 4 classes of off-label immunosuppressive treatments are sometimes used (alkylating agents, inhibitors of T-lymphocyte signalling, antimetabolites and biological modifiers). We conducted a systematic review and meta-analysis to assess the effectiveness of different treatment classes on uveitis patients with similar characteristics. Results of the systematic review concurred with the conclusions from the meta-analysis, which found that all immunosuppressive treatments improved patient vision, with a statistically significant change in logMAR of -0.11 (95% CI of -0.152 …

Diary Of A Cataract Surgeon 2045, Claire E. Mcdonnell

Articles

No abstract provided.

Efficient In Vitro Development Of Photoreceptors From Human Pluripotent Stem Cells, Joseph C. Reynolds

Dissertations, Masters Theses, Capstones, and Culminating Projects

Degeneration of the rod and cone photoreceptors in the human retina is among the most common causes of blindness. Replacing these damaged photoreceptors may help to restore vision. Repairing the damaged retina relies on the insertion of new, healthy cells. Embryonic stem (ES) cells and induced pluripotent stem (iPS) cells are two possible sources of photoreceptors to restore vision. Previous data shows that human ES cells and iPS cells can be differentiated into photoreceptors and transplanted into the eye to restore some vision. However, this process is inefficient, and costly. Here, we show a new method for inducing photoreceptor production …

Vision Problems In Ecuador: Developing A Clinical Trial To Test Visual Acuity In Rural Populations, Ty B. Bolte

Honors College

In many developing countries, access to medical care and screenings are difficult, and this is especially true for countries with large rural populations, such as Ecuador. There are many groups and non-governmental organizations (NGOs) that contribute time and money to educational systems and other basic infrastructure, but not necessarily medical screenings. In the case of eyesight, without proper screening an individual may fall behind academically or even withdraw from education simply because they cannot see. The simple addition of corrective lenses could be the difference between a life of poverty, and a life of wellbeing for many of these individuals. …

Engagement With A Custom-Made Online System Designed To Support Undergraduate Work Placement, Claire Mcdonnell, Fran Pedreschi

Claire McDonnell

No abstract provided.

Visionary Winter 2015, College Of Optometry

Visionary

No abstract provided.

Silicone Hydrogels: The Best All-Rounder?, Claire Mcdonnell

Claire McDonnell

No abstract provided.

Macular Pigment Spatial Distribution Effects On Glare Disability, Christopher Putnam, Carl Bassi

College of Optometry Faculty Works

Purpose This project explored the relationship of the macular pigment optical density (MPOD) spatial profile with measures of glare disability (GD) across the macula. Results The cHFP identified reliable MPOD spatial distribution maps demonstrating a 1st-order exponential decay as a function of increasing eccentricity. There was a significant negative correlation between both measures of foveal MPOD and GD using 6cycles per degree (cpd) and 9cpd stimuli. Significant correlations were found between corresponding parafoveal MPOD measures and GD at 2 and 4° of eccentricity using 9cpd stimuli with greater MPOD associated with less glare disability. Conclusions These results are consistent with …

Talento Humano En Salud Visual Y Ocular De Optometría En La Localidad De Engativá De La Ciudad De Bogotá D.C. Durante Los Años 2013 2014, Karen Marcela Aguilar Ríos, Edgar Alberto Castro Castañeda

Optometría

El presente trabajo de grado “Talento humano en salud visual y ocular de optometría en la localidad de Engativá de la ciudad de Bogotá D.C. durante los años 2013-2014”, logró definir las características que identifica a los profesionales que trabajan en el área de la salud visual, desde el punto de vista demográfico, socioeconómico, laboral, de formación académica, experiencia profesional, dominio de otro idioma, honorarios por consulta, entre otros. El objetivo fue caracterizar el Talento Humano en salud visual y ocular de optometría en la localidad de Engativá en la ciudad de Bogotá D.C. durante los años 2013-2014. Materiales y …

La Responsabilidad Social Empresarial: Estrategia De Posicionamiento Y Competitividad En El Programa De Optometría De La Universidad De La Salle, Marcela Camacho Montoya

Ciencia y Tecnología para la Salud Visual y Ocular

En la actualidad, la responsabilidad social es un tema de gran interés para muchas empresas, por los beneficios que genera, y puede abordarse desde objetivos morales, éticos, económicos o sociales. Si las universidades se constituyen en una empresa, entonces es válido considerar que estas utilizan las acciones de responsabilidad social empresarial como estrategia de competitividad para mejorar su posicionamiento y reputación en el medio. Para el caso de la optometría, concebida como una disciplina dentro de las ciencias de la salud, es indiscutible la fundamentación y proyección del ejercicio laboral, el cual, direccionado hacia la empresa, no puede distar de …

Barriers To Utilisation Of Refractive Services In Mozambique., James Loughman, Stephen Thompson, Carmen Gonzalez-Alvarez, Kovin Naidoo, Farai Chinanayi, Geoff Harris

Articles

Mozambique has a population of more than 25 million people.1 Nampula Province has just fewer than 4 million people.2 Although Mozambique is currently experiencing unprecedented economic growth rates, buoyed by the discovery of natural resources, significant challenges remain for the population, such as adequate health care, including eye health services. VISION 2020 is a global initiative to eliminate avoidable blindness by the year 2020. Its core strategies are focused on human resource development, infrastructure development, and disease control.3 The Mozambique Eyecare Project delivered a regional optometry model for Lusophone Africa, based on the VISION 2020 core strategies. A key output …

Rapid Assessment Of Refractive Error, Presbyopia, And Visual Impairment And Associated Quality Of Life In Nampula, Mozambique, James Loughman, Lindelwa Nxele, Cesar Faria, Stephen Thompson, Prasidh Ramson, Farai Chinanyi, Kovin S. Naidoo

Articles

Introduction: Uncorrected refractive error is the leading cause of visual impairment worldwide and leads to an impaired quality of life. This study was designed to determine the prevalence of uncorrected refractive error and presbyopia, to assess spectacle coverage, and to evaluate visual health-related quality of life among persons aged 15–50 years old in Nampula, Mozambique.

Methods: Participants were assessed using a validated rapid assessment of refractive error protocol, comprised of a demographic questionnaire, a standardized ophthalmic assessment to determine refractive status and spectacle coverage, and a modified vision-related quality of life questionnaire to assess the impact of uncorrected refractive error …