Evaluación del rendimiento visual con lentes progresivas mediante eye-tracker
Loading...
Download
Official URL
Full text at PDC
Publication date
2024
Defense date
20/03/2024
Authors
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Complutense de Madrid
Citation
Abstract
El objetivo de la presente tesis doctoral es evaluar la aplicabilidad de los sistemas de eye-tracker para la evaluación del rendimiento visual de lentes de potencia progresiva. Para ello se realizaron tres experimentos independientes entre sí de tipo prospectivo, longitudinal y doble ciego.En el primer experimento se evaluaron las características de las fijaciones durante la lectura como predictor de la preferencia subjetiva de lentes de potencia progresiva. Se utilizó el sistema de eye-tracker fijo Tobii X3-120 (Tobii AB, Suecia) con una frecuencia de muestreo de 120 Hz para registrar la posición pupilar de 38 participantes présbitas durante la lectura de un texto en una pantalla de ordenador situada a 0.67 m mientras utilizaban dos diseños diferentes de lentes de potencia progresiva: un diseño más suave con menor gradiente de potencia cilíndrica (LPP-Suave) y un diseño más duro con mayor gradiente de potencia cilíndrica (LPP-Dura). Los resultados mostraron que existe una relación entre las características de las fijaciones y la preferencia subjetiva por una distribución de potencias especifica. Los participantes con un menor tiempo completo de las fijaciones, menor duración media de las fijaciones y menor número de fijaciones prefieren una configuración de diseño progresivo más dura, al contrario que los participantes que prefieren una configuración más suave que presentan un mayor tiempo completo de las fijaciones, mayor duración media de las fijaciones y mayor número de fijaciones..
The objective of this doctoral thesis is to evaluate the applicability of eye-tracking systems for the assessment of the visual performance of progressive power lenses. For this purpose, three independent, prospective, longitudinal, and double-blind experiments were conducted.In the first experiment, fixation characteristics during reading were evaluated as a predictor of subjective preference for progressive power lenses. A fixed eye-tracking system with a sampling frequency of 120 Hz, Tobii X3-120 (Tobii AB, Sweden), was used to record the pupil position of 38 presbyopic participants while reading a text on a computer screen located at 0.67 m, using two different designs of progressive power lenses: a lens design with a lower cylindrical power gradient (LPP-Suave) and a harder design with a greater cylindrical power gradient (LPP-Dura). The results showed that there is a relationship between fixation characteristics and subjective preference for a specific power distribution. Participants with a lower complete fixation time, lower mean fixation duration, and less fixation count prefer a harder progressive design configuration, whereas participants who prefer a smoother configuration have a higher complete fixation time, higher mean fixation time, and more fixation count...
The objective of this doctoral thesis is to evaluate the applicability of eye-tracking systems for the assessment of the visual performance of progressive power lenses. For this purpose, three independent, prospective, longitudinal, and double-blind experiments were conducted.In the first experiment, fixation characteristics during reading were evaluated as a predictor of subjective preference for progressive power lenses. A fixed eye-tracking system with a sampling frequency of 120 Hz, Tobii X3-120 (Tobii AB, Sweden), was used to record the pupil position of 38 presbyopic participants while reading a text on a computer screen located at 0.67 m, using two different designs of progressive power lenses: a lens design with a lower cylindrical power gradient (LPP-Suave) and a harder design with a greater cylindrical power gradient (LPP-Dura). The results showed that there is a relationship between fixation characteristics and subjective preference for a specific power distribution. Participants with a lower complete fixation time, lower mean fixation duration, and less fixation count prefer a harder progressive design configuration, whereas participants who prefer a smoother configuration have a higher complete fixation time, higher mean fixation time, and more fixation count...
Description
Tesis inédita de la Universidad Complutense de Madrid, Facultad de Óptica y Optometría, leída el 20-03-2024.