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Development Of Sensitive Holographic Devices For Physiological Metal Ion Detection, Sabad-e- Gul, Suzanne Martin, John Cassidy, Izabela Naydenova 2017 Dublin Institute of Technology

Development Of Sensitive Holographic Devices For Physiological Metal Ion Detection, Sabad-E- Gul, Suzanne Martin, John Cassidy, Izabela Naydenova

Conference Papers

The development of selective alkali metal ions sensors in particular is a subject of significant interest. In this respect, the level of blood electrolytes, particularly H+, Na+, K+ and Cl- , is widely used to monitor aberrant physiologies associated with pulmonary emphysema, acute and chronic renal failure, heart failure, diabetes. The sensors reported in this paper are created by holographic recording of surface relief structures in a self-processing photopolymer material. The structures are functionalized by ionophores dibenzo-18-crown-6 (DC) and tetraethyl 4-tert-butylcalix[4]arene (TBC) in plasticised polyvinyl chloride (PVC) matrix. Interrogation of these structures by light allows indirect measurements of chemical ...


Focal Loss Volume Best Differentiates Eyes With Afferent Pupillary Defect, Eulogio Besada, Barry J. Frauens, Rim Makhlouf, Diana Shechtman, Julie Rodman, Marlon Demeritt, Patrick Hardigan 2017 Nova Southeastern University College of Optometry

Focal Loss Volume Best Differentiates Eyes With Afferent Pupillary Defect, Eulogio Besada, Barry J. Frauens, Rim Makhlouf, Diana Shechtman, Julie Rodman, Marlon Demeritt, Patrick Hardigan

Interprofessional Optometry

Purpose: To quantify the specificity and sensitivity of RTVue-100, Optovue parameters at determining the presence of a relative afferent pupillary defect (RAPD) by coupling their values with the instrument normative data base (NDB) and the presence of a RAPD. To generate the distribution for the focal loss volume (FLV) percentage, by coupling its value to the instrument NDB and presence of a RAPD.

Methods: Forty one subjects with a RAPD and glaucomatous or non-glaucomatous optic neuropathy participated. A neutral density filter bar was used to estimate the RAPD. The specificity and sensitivity of all parameters was analyzed using Fisher’s ...


Contrast Sensitivity Testing In Normal Vision: Performance With Letter Vs. Continuous Text, Kristen Davis, Marc Taub, Patricia Cisarik 2017 Southern College of Optometry

Contrast Sensitivity Testing In Normal Vision: Performance With Letter Vs. Continuous Text, Kristen Davis, Marc Taub, Patricia Cisarik

Interprofessional Optometry

Introduction: Contrast sensitivity is a visual element used in optometric examinations to help assess visual capacity. This study compared two formats of contrast sensitivity tests, ETDRS Letters and Continuous Text.

Methods: Contrast sensitivity was measured in 75 subjects, who met inclusion criteria, using the Adult Near Contrast Test. Patients’ verbal readings provided data for the formats at five contrast levels. Results: Average visual acuity and number of lines/paragraphs read correctly decreased with decreasing contrast. ANOVAs showed significant differences by contrast level in total words and total letters (ps< 0.001) and a Pearson correlation gave high correlations between the contrast sensitivity readings of the two formats except at 100% contrast (ps< 0.05; p= 0.69).

Conclusion: Analysis revealed that contrast sensitivity readings from the different formats ...


Book Review: Compendium Of Works On Visual Rehabilitation, Volume I, James Kundart 2017 Pacific University

Book Review: Compendium Of Works On Visual Rehabilitation, Volume I, James Kundart

Interprofessional Optometry

No abstract provided.


Assessment Of Enchroma Filter For Correcting Color Vision Deficiency, Nawaf Almutairi, James Kundart, Naganathan Muthuramalingam, John Hayes, Karl Citek, Saad Aljohani 2017 Pacific University

Assessment Of Enchroma Filter For Correcting Color Vision Deficiency, Nawaf Almutairi, James Kundart, Naganathan Muthuramalingam, John Hayes, Karl Citek, Saad Aljohani

College of Optometry

Purpose: Color vision deficiency (CVD) especially the Red-Green type (RG), affects 8% of the male and 0.5% of the female population. There is no cure for color deficiency. However, there are specially-tinted lenses marketed to enhance the color contrast for CVD individuals. Recently, EnChroma Filters claim to enhance color perception. The aim of this study was to examine EnChroma Cx-14, red, and green filters subjectively on subjects with RG CVD.

Methods: Nine males and one female (aged 19 – 52 years) with RG CVD were recruited. Five were severe deutans, two moderate deutans, and two were severe protans. Subjective responses ...


Basic Vision Research With Clinical Applications And Science Education Assessments, Andrew Wilson 2017 The University of Maine

Basic Vision Research With Clinical Applications And Science Education Assessments, Andrew Wilson

Electronic Theses and Dissertations

Visual Acuity (VA) examinations are one of the most commonly conducted medical assessment throughout the world. Recent advances in computer technology allows for new forms of visual assessment to be conducted. In Part I of this thesis I demonstrate the capability of an automated computer program named VISION to assess human visual acuities. Different color combinations of an object against a background emitted from a computer screen are used to examine a variety of human color vision acuities. Results indicated a large difference in acuity scores between human subjects tested with these different color combinations. A single human subject exhibits ...


Competency-Based Assessment Of Refractive Error Measurement In A Mozambique Optometry School, Kajal Shah, Kovin Naidoo, Luigi Bilotto, James Loughman 2017 Dublin Institute of Technology

Competency-Based Assessment Of Refractive Error Measurement In A Mozambique Optometry School, Kajal Shah, Kovin Naidoo, Luigi Bilotto, James Loughman

Articles

Background: The aims of this study were to develop a process for assessing refractive error management competence among the first two cohorts of students in a new optometry program at Unilúrio in Mozambique and to understand the effectiveness of implementing the process in the context of a low resource environment. Methods: The assessment methods were developed using information from a literature review and a focus group discussion and implemented on 15 students. Results: The exams consisted of direct observation of two patients, short-answer questions and a structured oral examination. Conclusion: The use of existing checklists and rating skills helped to ...


Latanoprost And Timolol In Hydrogel Soft Drug-Dispensing Contact Lenses: A Comparative Analysis, Neha Potdar 2017 Virginia Commonwealth University

Latanoprost And Timolol In Hydrogel Soft Drug-Dispensing Contact Lenses: A Comparative Analysis, Neha Potdar

Virginias Collegiate Honors Council Conference

Glaucoma patients only can instill glaucoma eye drops. This results in 1-7% absorption of the medication. Surveys show that patients forget to take their medication and have difficulty inserting their eye drops. Researchers at the Massachusetts Eye and Ear Infirmary have developed latanoprost drug-dispensing hydrogel soft contact lenses that dispense the drug to help facilitate the process. However, some glaucoma patients do not respond to latanoprost because they have uveitic glaucoma or do not want to experience latanoprost’s ocular side effects. Patients need an alternative which can be inserted into these contact lenses. Another commonly used glaucoma drug is ...


Targeted Aav5-Smad7 Gene Therapy Inhibits Corneal Scarring In Vivo, Suneel Gupta, Jason T. Rodier, Ajay Sharma, Elizabeth A. Giuliano, Prashant R. Sinha, Nathan P. Hesemann, Arkasubhra Ghosh, Rajiv R. Mohan 2017 Harry S. Truman Memorial Veterans' Hospital

Targeted Aav5-Smad7 Gene Therapy Inhibits Corneal Scarring In Vivo, Suneel Gupta, Jason T. Rodier, Ajay Sharma, Elizabeth A. Giuliano, Prashant R. Sinha, Nathan P. Hesemann, Arkasubhra Ghosh, Rajiv R. Mohan

Pharmacy Faculty Articles and Research

Corneal scarring is due to aberrant activity of the transforming growth factor β (TGFβ) signaling pathway following traumatic, mechanical, infectious, or surgical injury. Altered TGFβ signaling cascade leads to downstream Smad (Suppressor of mothers against decapentaplegic) protein-mediated signaling events that regulate expression of extracellular matrix and myogenic proteins. These events lead to transdifferentiation of keratocytes into myofibroblasts through fibroblasts and often results in permanent corneal scarring. Hence, therapeutic targets that reduce transdifferentiation of fibroblasts into myofibroblasts may provide a clinically relevant approach to treat corneal fibrosis and improve long-term visual outcomes. Smad7 protein regulates the functional effects of TGFβ signaling ...


Barriers To Glaucoma Case Finding As Perceived By Optometrists In Ireland, Catriona Barrett, Colm O'Brien, John Butler, James Loughman 2017 Dublin Institute of Technology

Barriers To Glaucoma Case Finding As Perceived By Optometrists In Ireland, Catriona Barrett, Colm O'Brien, John Butler, James Loughman

Articles

Background: This research was designed to provide an in-depth exploration of the perceptions of optometrists relating to the challenges of glaucoma case finding in the Irish health-care system.

Methods: A survey was developed, piloted and distributed for anonymous completion by optometrists registered to practice in Ireland. The survey included 10 five-level Likert items exploring potential barriers to glaucoma detection and a free-text box for participants to comment more broadly.

Results: One hundred and ninety-nine optometrists (27 per cent of registrants) responded to the survey. Among the barriers identified, there was notable agreement (71 per cent) with the need for extra ...


Time To Refocus Assessment Of Vision In Older Adults? Contrast Sensitivity But Not Visual Acuity Is Associated With Gait In Older Adults, James Loughman, Eoin Duggan, Orna Donoghue,, Rose Anne Kenny, Hilary Cronin, Ciarán Finucane 2017 Dublin Institute of Technology

Time To Refocus Assessment Of Vision In Older Adults? Contrast Sensitivity But Not Visual Acuity Is Associated With Gait In Older Adults, James Loughman, Eoin Duggan, Orna Donoghue,, Rose Anne Kenny, Hilary Cronin, Ciarán Finucane

Articles

Background:

The relationship between measures of visual function and gait related risk factors for falls is unclear. In this study, we examine the relationship between visual function (visual acuity [VA] and contrast sensitivity [CS] at multiple spatial frequencies) and quantitative spatiotemporal gait, using a large, nationally representative sample of community dwelling older adults.

Methods: Participants aged 50 and over were recruited as part of The Irish Longitudinal Study on Ageing (TILDA). VA was measured with the LogMAR chart according to the Early Treatment of Diabetic Retinopathy Study protocol. CS was measured at five spatial frequencies ranging 1.5 to 18 ...


Perceived Barriers Of Optometrists To Glaucoma Case Findings In Ireland, James Loughman, Catriona Barrett, Colm O’Brien, John Butler 2017 Dublin Institute of Technology

Perceived Barriers Of Optometrists To Glaucoma Case Findings In Ireland, James Loughman, Catriona Barrett, Colm O’Brien, John Butler

Articles

Background:

This research was designed to provide an in-depth exploration of the perceptions of optometrists relating to the challenges of glaucoma case finding in the Irish health-care system.

Methods: A survey was developed, piloted and distributed for anonymous completion by optometrists registered to practise in Ireland. The survey included 10 five-level Likert items exploring potential barriers to glaucoma detection and a free-text box for participants to comment more broadly.

Results: One hundred and ninety-nine optometrists (27 per cent of registrants) responded to the survey. Among the barriers identified, there was notable agreement (71 per cent) with the need for extra ...


College Of Optometry Overview 2017, Nova Southeastern University 2017 Nova Southeastern University

College Of Optometry Overview 2017, Nova Southeastern University

Health Professions Divisions Course Catalogs

No abstract provided.


Neuro-Behavioral Effects Of Luminance Level On Visual Performance And Discomfort With High Dynamic Range Displays, Shun-nan Yang, Manho Jang, Ju Liu 2017 Pacific University

Neuro-Behavioral Effects Of Luminance Level On Visual Performance And Discomfort With High Dynamic Range Displays, Shun-Nan Yang, Manho Jang, Ju Liu

VPI Research

High dynamic range (HDR) displays are designed to simulate the range of perceived brightness afforded by the real world. To study how visual performance and visual comfort are affected by luminance level, 34 participants with normal vision were first asked to discriminate the brightness of two circles presented on LCD and OLED screens to determine the luminance threshold for brightness discrimination. They then judge the orientation of a circular grating target alternating with a luminance circle while their visually-evoked potentials and viewing discomfort was assessed. Results show contrast ratio is more important than luminance difference in brightness discrimination. Regression model ...


A Process Improvement Project To Increase Diabetic Retinopathy Screening Rates As Evidenced By Formal Documentation, Michelle Renae Campbell 2017 University of Kentucky

A Process Improvement Project To Increase Diabetic Retinopathy Screening Rates As Evidenced By Formal Documentation, Michelle Renae Campbell

DNP Projects

Purpose: To evaluate the effects of a referral process on diabetic retinopathy screening rates among patients with Type 2 diabetes and formal documentation completion rates of these screenings within a primary care setting.

Methods: A referral process for patient referral to an ophthalmologist for annual diabetic retinopathy screening was instituted for a 4-week period within a Norton Community Medical Associates (NCMA) primary care location for Type 2 diabetes patients. Charts of 30 patients pre-intervention were compared with the charts of 30 patients seen during the intervention phase of the study to evaluate the effects of the referral intervention. Demographic data ...


Visual Impairment And Factors Associated With Difficulties With Daily Tasks, Anne T. Riddering 2016 Western Michigan University

Visual Impairment And Factors Associated With Difficulties With Daily Tasks, Anne T. Riddering

Dissertations

In the past 10 years, the number of American adults with visual impairments has increased from 1 million to 4 million and is expected to double to 8 million people by the year 2050 (The Eye Diseases Prevalence Research Group, 2004; National Eye Institute, 2013). Therapies to treat retinal diseases causing visual impairment, such as diabetic retinopathy and age-related macular degeneration (Massof, 2002; Mogk, 2011), have evolved in the past two decades (Gupta et al., 2013; Hooper & Guymer, 2003), but little research has examined recent population and difficulties with performing daily activities. Different types of professionals, including ophthalmologists, optometrists, occupational therapists, orientation and mobility specialists, vision rehabilitation therapists, and low vision therapists, work to assist adults with visual impairments remain independent with daily tasks, and an understanding of population characteristics is critical to providing successful treatment (Court, McLean, Guthrie, Mercer, & Smith, 2014; Johnson & Romanello, 2005; Salive, 2013). The studies in this three-paper dissertation examine difficulties with daily tasks, factors contributing to these difficulties, and similarities and differences ...


When The Challenges Of Aging And Visual Impairment Collide: Working Together To Build A Toolbox Of Rehab Ideas Of Best Care For Older Adults, Regula H. Robnett, Kathy Clarrage 2016 University of New England

When The Challenges Of Aging And Visual Impairment Collide: Working Together To Build A Toolbox Of Rehab Ideas Of Best Care For Older Adults, Regula H. Robnett, Kathy Clarrage

Occupational Therapy Faculty Presentations

Workshop/presentation by Regi Robnett, Ph.D., OTR/L, FAOTA, professor in the UNE Department of Occupational Therapy and Kathy Clarrage, COMS, Certified Orientation and Mobility Specialist for the State of Maine. Given at the North East Chapter of the Association for Education and Rehabilitation for the Blind and Visually Impaired (NEAER) conference, this presentation encouraged health care providers to work as a team to care for older, visually impaired adults. The professional audience included orientation and mobility specialists, vision rehabilitation therapists, low vision specialists, administrators in the field of blindness, social workers in the field of blindness and vocational ...


Recording Of High Efficiency Volume Bragg Gratings In A Photopolymer Using Diffraction From Very Weak Pre-Recorded Gratings, Denis Bade 2016 Dublin Institute of Technology

Recording Of High Efficiency Volume Bragg Gratings In A Photopolymer Using Diffraction From Very Weak Pre-Recorded Gratings, Denis Bade

Articles

No abstract provided.


Addressing Disability In The Health System At Caritas Takeo Eye Hospital, Manfred Morchen, Gail Ormsby, Te Serey Bonn, David Lewis 2016 Takeo Eye Hospital

Addressing Disability In The Health System At Caritas Takeo Eye Hospital, Manfred Morchen, Gail Ormsby, Te Serey Bonn, David Lewis

Gail Ormsby

The article describes how the CARITAS Takeo Eye Hospital (CTEH) in Cambodia has worked hard to be more inclusive of people with disabilities. It mentions that the process to address the disability at the CTEH began in 2008 with the construction of new premises with universal design which reduced the physical barriers for everybody. The CTEH staff was trained on inclusion by CBM Australia and the Nossal Institute for Global Health; disability-inclusive practices reported a positive outcome.


Knowledge, Attitudes And Practice Of Diabetes In Rural Bangladesh: The Bangladesh Population Based Diabetes And Eye Study, Fakir M. Amirul Islam, Rahul Chakrabarti, Mohamed Dirani, Mohamed T. Islam, Gail Ormsby, Mohamed Wahab, Christine Critchley, Robert P. Finger 2016 Swinburne University of Technology

Knowledge, Attitudes And Practice Of Diabetes In Rural Bangladesh: The Bangladesh Population Based Diabetes And Eye Study, Fakir M. Amirul Islam, Rahul Chakrabarti, Mohamed Dirani, Mohamed T. Islam, Gail Ormsby, Mohamed Wahab, Christine Critchley, Robert P. Finger

Gail Ormsby

Background: To assess the Knowledge, Attitudes and Practice (KAP) amongst the general community regarding type 2diabetes mellitus (DM) in rural Bangladesh. Methods: Data was collected using cluster random sampling from 3104 adults residing in a rural district in Bangladesh. Participants underwent a KAP questionnaire survey regarding assessing diabetes, socio-demographic and medical history. Descriptive, Chi-square and regression analyses were performed. Results: Participants were aged between 30 and 89 years (M = 51, SD = 11.8) and 65.5% were female. The prevalence of diabetes was found to be 8.3%. The majority (93%) reported to have heard of diabetes, yet only 4 ...


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