Vision Science Commons^™

Comparación De Las Manifestaciones Oculares Durante El Contagio Por Covid-19 Y Después De La Vacunación, Luisa Fernanda Aguilar Serrano, Daniel Sebastián Cruz Mendoza, Nicolle Daniela Hernández Pacheco, Diana Valeria Rey-Rodríguez, Laura Nathaly Rojas Sánchez

Ciencia y Tecnología para la Salud Visual y Ocular

El objetivo del presente estudio es identificar la frecuencia de manifestaciones sistémicas y oculares en pacientes diagnosticados con COVID-19, y analizar los síntomas asociados a la vacunación. Como metodología, se diseñó un cuestionario de 15 preguntas sobre manifestaciones oculares asociadas a la SARS-CoV-2 y síntomas tras la vacunación. Se realizó un análisis descriptivo, incluyendo el uso de porcentajes y frecuencias para variables cualitativas. Se realizaron análisis bivariados según la relación existentes entre las variables de interés. En el estudio participaron 270 personas en los siguientes porcentajes según edad: menores de 18 años, 10,7 % (29 personas); de 18 a 30 …

Efecto Del Humo De Tabaco En La Película Lagrimal En Fumadores Activos Y Pasivos: Revisión De Tema, Mayra Jessica Tapia-Vargas, Mitzi Lorea Rodríguez De La Torre, Aranza Valeria García-Figueroa, Amabile A. Velo-Silvestre

Ciencia y Tecnología para la Salud Visual y Ocular

Fumar tabaco de modo habitual, así como estar expuesto prolongadamente al humo del tabaco, son factores de riesgo para el desarrollo de diversos problemas en la superficie ocular; entre ellos, las alteraciones en la lágrima. El objetivo de esta revisión de tema es sintetizar la evidencia disponible sobre los diversos cambios que puede presentar la película lagrimal por la exposición del humo de tabaco. Para ello, se incluyeron estudios clínicos publicados entre los años 2016 y 2021, La búsqueda se realizó en tres bases de datos: PubMed, Web of Science y Science Direct, mediante las siguientes palabras clave: “tear film” …

2d Respiratory Sound Analysis To Detect Lung Abnormalities, Rafia Sharmin Alice, Kc Santosh

SDSU Data Science Symposium

Abstract. In this paper, we analyze deep visual features from 2D data representation(s) of the respiratory sound to detect evidence of lung abnormalities. The primary motivation behind this is that visual cues are more important in decision-making than raw data (lung sound). Early detection and prompt treatments are essential for any future possible respiratory disorders, and respiratory sound is proven to be one of the biomarkers. In contrast to state-of-the-art approaches, we aim at understanding/analyzing visual features using our Convolutional Neural Networks (CNN) tailored Deep Learning Models, where we consider all possible 2D data such as Spectrogram, Mel-frequency Cepstral Coefficients …

On The Pursuit Of Developer Happiness: Webcam-Based Eye Tracking And Affect Recognition In The Ide, Tamsin Rogers

Honors Theses

Recent research highlights the viability of webcam-based eye tracking as a low-cost alternative to dedicated remote eye trackers. Simultaneously, research shows the importance of understanding emotions of software developers, where it was found that emotions have significant effects on productivity, code quality, and team dynamics. In this paper, we present our work towards an integrated eye-tracking and affect recognition tool for use during software development. This combined approach could enhance our understanding of software development by combining information about the code developers are looking at, along with the emotions they experience. The presented tool utilizes an unmodified webcam to capture …

Neonatal Intraocular Injection And Delivery System, Nina Treacher, Cory Ramsey, Marie Kosco, Jackson Carrell

Williams Honors College, Honors Research Projects

The proposed project is a way to deliver liquid medicine into the neonatal eye to prevent retinal detachment with lower risk for bacterial infection and drug misplacement. Currently, ophthalmologists use diabetic needles to introduce medication to the neonate eye. They estimate the injection location with hand-held calipers. This may allow the medicine to be misplaced from poor needle placement and introduce preventable error. The goal is to improve the delivery system ophthalmologists currently use by investigating ways to alter or enhance commonly used injection systems to make the procedure safer and more effective.

Neurorretinitis Por Arañazo De Gato: A Propósito De Un Caso, Fernando Godín Estrada, Eduardo Enrique Cadena Galvis, Laura Alejandra Acevedo Espitia, Diana Valeria Rey-Rodríguez

Ciencia y Tecnología para la Salud Visual y Ocular

La enfermedad por arañazo de gato es una zoonosis distribuida por todo el mundo. En esa condición, los gatos son el reservorio primario de Bartonella henselae, siendo la pulga del gato (Ctenocephalides felis) el principal vector entre ellos. Dicha enfermedad se caracteriza por manifestaciones sistémicas predominantes en el cerebro, el ojo, el hígado, el bazo y el hueso. En este estudio se presenta el caso de una paciente femenina de 29 años, quien consultó por disminución de agudeza visual (AV) y dolor ocular pulsátil de intensidad 8/10, según la escala visual análoga (EVA) en el ojo izquierdo (OI), sin síntomas …

The Interconnection Of The Vestibular And Oculomotor Systems Analyzed In Healthy Young Adults By Examining Postural Sway, Cassandra Martin

Theses

In order to study the human brain in a non-invasive way, the vestibular and oculomotor systems have been analyzed simultaneously. To achieve this, an eye movement and balance assessment was conducted for 29 (23 male; 21.6 ± 3.8 years) healthy participants with no history of concussions, brain injuries, vertigo, migraines, brain surgeries, eye surgeries, or amblyopia. The tasks consisted of eyes open, eyes closed, horizontal saccades, vertical saccades, vergence jumps, horizontal vestibulo-ocular reflex (VOR), and vertical VOR. Each task was completed in two stances: feet shoulder width apart and feet together. Distance, velocity, sway area, center of pressure (COP) frequency, …

Investigating The Effect Of Dissolved Oxygen-Assisted Corneal Cross-Linking (Cxl) On Porcine Corneas, Julianni Dar

Electronic Theses and Dissertations

Corneal cross-linking is a clinical procedure that is known to stop the progression of keratoconus, an eye disease that affects the cornea’s structure, ultimately leading to vision loss in its advanced stages. The typical treatment plan includes riboflavin and UV-A exposure in the hope to increase the mechanical properties of the cornea. There are two types of CXL pathways, with Type-II CXL requiring oxygen. Naturally, the dissolved oxygen is limited in the cornea; therefore, limiting the effect of Type-II CXL. This study proposes to improve the Type-II CXL contribution by integrating dissolved oxygen during the standard CXL treatment used in …

Scandy: Simulating Realistic Human Scanpaths In Dynamic Real-World Scenes, Nicolas Roth, Martin Rolfs, Klaus Obermayer

MODVIS Workshop

No abstract provided.

Human Interaction With Fake News, Autumn Woodson, Sampath Jayarathna (Mentor)

Computer & Information Science: Research Experiences for Undergraduates in Disinformation Detection and Analytics

No abstract provided.

Eye Movement And Pupil Measures: A Review, Bhanuka Mahanama, Yasith Jayawardana, Sundararaman Rengarajan, Gavindya Jayawardena, Leanne Chukoskie, Joseph Snider, Sampath Jayarathna

Computer Science Faculty Publications

Our subjective visual experiences involve complex interaction between our eyes, our brain, and the surrounding world. It gives us the sense of sight, color, stereopsis, distance, pattern recognition, motor coordination, and more. The increasing ubiquity of gaze-aware technology brings with it the ability to track gaze and pupil measures with varying degrees of fidelity. With this in mind, a review that considers the various gaze measures becomes increasingly relevant, especially considering our ability to make sense of these signals given different spatio-temporal sampling capacities. In this paper, we selectively review prior work on eye movements and pupil measures. We first …

Customer Gaze Estimation In Retail Using Deep Learning, Shashimal Senarath, Primesh Pathirana, Dulani Meedeniya, Sampath Jayarathna

Computer Science Faculty Publications

At present, intelligent computing applications are widely used in different domains, including retail stores. The analysis of customer behaviour has become crucial for the benefit of both customers and retailers. In this regard, the concept of remote gaze estimation using deep learning has shown promising results in analyzing customer behaviour in retail due to its scalability, robustness, low cost, and uninterrupted nature. This study presents a three-stage, three-attention-based deep convolutional neural network for remote gaze estimation in retail using image data. In the first stage, we design a mechanism to estimate the 3D gaze of the subject using image data …

Visuomotor Adaptation During Asymmetric Walking, Charles Napoli

Masters Theses

Necessary for effective ambulation, head stability affords optimal conditions for the perception of visual information during dynamic tasks. This maintenance of head-in-space equilibrium is achieved, in part, by the attenuation of the high frequency impact shock resulting from ground contact. While a great deal of experimentation has been done on the matter during steady state locomotion, little is known about how head stability or dynamic visual acuity is maintained during asymmetric walking.

In this study, fifteen participants were instructed to walk on a split-belt treadmill for ten minutes while verbally reporting the orientation of a randomized Landolt-C optotype that was …

Poly(2-Hydroxyethyl Methacrylate) Hydrogels For Contact Lens Applications–A Review, Kushendarsyah Saptaji, Nurlaely Rohmatul Iza, Sinta Widianingrum, Vania Katherine Mulia, Iwan Setiawan

Makara Journal of Science

The emerging technology in biomedical engineering requires biocompatible materials, which are also referred to as biomaterials. For a material to be considered biocompatible, it should not interact with human tissues in a harmful way, and vice versa. Various properties of biocompatible materials, such as mechanical and optical properties, have to be considered for different biomedical applications. One of the most popular applications of biomaterials is for contact lenses. Hydrogels, specifically poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogels, are among the most popular ones in ophthalmologic applications, especially in soft contact lenses. This paper reviews the use of PHEMA hydrogels as one of the …

During Natural Viewing, Neural Processing Of Visual Targets Continues Throughout Saccades, Atanas D. Stankov, Jonathan Touryan, Stephen Gordon, Anthony J. Ries, Jason Ki, Lucas C. Parra

Publications and Research

Relatively little is known about visual processing during free-viewing visual search in realistic dynamic environments. Free-viewing is characterized by frequent saccades. During saccades, visual processing is thought to be suppressed, yet we know that the presaccadic visual content can modulate postsaccadic processing. To better understand these processes in a realistic setting, we study here saccades and neural responses elicited by the appearance of visual targets in a realistic virtual environment. While subjects were being driven through a 3D virtual town, they were asked to discriminate between targets that appear on the road. Using a system identification approach, we separated overlapping …

Análisis En El Tiempo De La Transmisibilidad De La Luz Visible Y Ultravioleta En Dos Materiales De Lentes Fotocromáticos, Augusto Diaz Escobar, Esteban Goñi Boza, Manuel Felipe Masis Soto

Ciencia y Tecnología para la Salud Visual y Ocular

La luz ultravioleta comprende longitudes de onda con altos valores de energía que pueden tener repercusiones en la salud humana, lo cual preocupa cada vez más al sector salud. Por ello, las lentes fotosensibles se han transformado en una alternativa para la protección ocular. Sin embargo, la pérdida de transmisibilidad de estas puede representar dificultades en la percepción visual en ambientes donde el flujo luminoso se ve disminuido. Es importante tomar en cuenta la capacidad de transmisibilidad de las coberturas fotocromáticas de las lentes oftálmicas, tomando en cuenta su capacidad tanto en luz visible como ultravioleta. El objetivo del presente …

Expectativas De Los Pacientes De Un Consultorio Particular Frente A La Atención De Optometría Durante La Pandemia Por Covid-19, Diana V. Rey-Rodríguez, Lady Johana Morales-Solano, Paula Pérez-Espinel

Ciencia y Tecnología para la Salud Visual y Ocular

La opinión de los pacientes frente a la atención optométrica debe ser relevante para la creación de estrategias de mercado en consultorios y ópticas. El objetivo del presente estudio es conocer las expectativas de los pacientes frente a la atención optométrica durante la pandemia por Covid-19. En cuanto a la metodología, el presente es un estudio observacional, descriptivo de corte transversal, en el cual se diseñó un instrumento conformado por ocho ítems, que buscó indagar la opinión de los pacientes para asistir a una consulta de optometría durante la pandemia por Covid-19. El muestreo fue no probabilístico por conveniencia a …

Prevalencia De Miopía En América: Revisión Sistemática Y Metaanálisis, Diana V. Rey-Rodríguez, José Moreno-Montoya, Cristina Álvarez-Peregrina

Ciencia y Tecnología para la Salud Visual y Ocular

En los últimos años, la prevalencia de la miopía en el mundo ha aumentado significativamente. El objetivo de este trabajo fue identificar la prevalencia combinada de la miopía en América según las siguientes categorías: edad, raza, género y región. Se realizó una revisión sistemática de la literatura en las bases de datos Medline, Embase y Lilacs, con el objetivo de buscar estudios transversales con información sobre la prevalencia de miopía. Para encontrar la prevalencia combinada se utilizó el método de doble arco sinusoidal de efectos fijos o aleatorios de Freeman-Tukey. Se analizaron 15 estudios que incluyeron a 45.349 personas de …

Distrofia Foveomacular Viteliforme Del Adulto: Reporte De Caso, Marcelo Carrizosa Murcia, Mónica Lizeth Moreno Robayo

Ciencia y Tecnología para la Salud Visual y Ocular

El propósito de este reporte de caso fue caracterizar la distrofia foveomacular viteliforme del adulto (AOFVD), y establecer los principales diagnósticos diferenciales de este trastorno. La distrofia viteliforme del adulto fue definida por primera vez por Gass en 1974, para describir una entidad clínica de herencia autosómica dominante y su comienzo en la edad adulta. Esta está caracterizada por la presencia bilateral de lesiones redondeadas de color amarillento y localización subfoveal. La imagen angiográfica clásica es una hiperfluorescencia en anillo que rodea una zona central hipofluorescente. Esta presenta características clínicas y electrofisiológicas que permiten establecer el diagnóstico diferencial con otras …

Laparoscopic Image Recovery And Stereo Matching, Wenyao Xia

Electronic Thesis and Dissertation Repository

Laparoscopic imaging can play a significant role in the minimally invasive surgical procedure. However, laparoscopic images often suffer from insufficient and irregular light sources, specular highlight surfaces, and a lack of depth information. These problems can negatively influence the surgeons during surgery, and lead to erroneous visual tracking and potential surgical risks. Thus, developing effective image-processing algorithms for laparoscopic vision recovery and stereo matching is of significant importance. Most related algorithms are effective on nature images, but less effective on laparoscopic images.

The first purpose of this thesis is to restore low-light laparoscopic vision, where an effective image enhancement method …