Explanipedia

Improving the estimation of the spherical equivalent subjective refraction using objective information on accommodation Open

Aina Turull-Mallofré, Mikel Aldaba, Jaume Pujol, Carlos Guerra · 2025

Machine learning and deep learning have previously been used to predict the subjective refraction endpoint by objective means with modest success. This study aimed to enhance predictive accuracy by training linear regression models with no…

Precision and agreement of axial length in paediatric population measured with MYAH and AL-Scan biometers Open

Mikel Aldaba, Pablo Ochando, Núria Vila‐Vidal, Valldeflors Viñuela-Navarro, Laura Guisasola València , et al. · 2023

The repeatability, reproducibility, and agreement of the MYAH and AL-Scan biometers seem optimal for following children with myopia.

Influence of power and the time of application of fogging lenses on accommodation Open

Aina Turull-Mallofré, Carlos Guerra, Clara Mestre, Meritxell Vilaseca, Jaume Pujol , et al. · 2023

Fogging is a non-invasive technique based on the use of positive spherical power lenses to relax accommodation during refraction that is commonly used as an alternative to cycloplegic drugs. Although the mechanism of the fogging technique …

Eye movements in patients with post-COVID condition Open

Valldeflors Viñuela-Navarro, Joan Goset, Mikel Aldaba, Clara Mestre, Cristina Rovira‐Gay , et al. · 2023

Eye movement control is impaired in some neurological conditions, but the impact of COVID-19 on eye movements remains unknown. This study aims to investigate differences in oculomotor function and pupil response in individuals who suffer p…

System for Objective Assessment of the Accommodation Response During Subjective Refraction Open

Carlos Guerra, Juan Antonio Martínez Roda, Juan Carlos Ondategui Parra, Aina Turull-Mallofré, Mikel Aldaba , et al. · 2023

The developed system can be used as a supporting tool during subjective refraction to provide certainty about the true state of accommodation.

Extended measured area tear film stability assessment method by corneal reflex image degradation. Open

Mikel Aldaba, Fernando Díaz Doutón, Jaume Pujol · 2021

Effect of the power and time of application of fogging lenses in the control of accommodation Open

Aina Turull Mallofre, Mikel Aldaba, Carlos Guerra, Joan Goset, Jaume Pujol · 2021

Real-time monitoring of accommodation during subjective refraction Open

Carlos Guerra, Juan Antonio Martínez Roda, Mikel Aldaba, Sandra Galera, Cristina Aransay , et al. · 2020

Stimulus Unpredictability in Time, Magnitude, and Direction on Accommodation Open

Carles Otero, Mikel Aldaba, Fernando Díaz-Doutón, Fuensanta A. Vera‐Díaz, Jaume Pujol · 2019

SIGNIFICANCE The effect of predictability in changes of time, magnitude, and direction of the accommodation demand on the accommodation response latency and its magnitude are insignificant, which suggests that repetitive accommodative task…

Tear film stability assessment by corneal reflex image degradation Open

Mikel Aldaba, Alejandro Mira-Agudelo, John Fredy Barrera, Carlos Guerra, Jaume Pujol · 2019

Tear film stability assessment is one of the main tests in dry eye diagnosis. However, to date, no test methodology has been adopted as the gold standard due to several reasons, such as the methods being invasive, subjective, or unfeasible…

Clinical evaluation of an automated subjective refraction method implemented in a computer-controlled motorized phoropter Open

Carles Otero, Mikel Aldaba, Jaume Pujol · 2018

The proposed automated method is repeatable and more accurate than objective techniques in healthy adults. However, it is not accurate enough to replace the clinical subjective refraction yet and it should be tested in a wider population i…

An automated accommodative facility test with unpredictable stimuli Open

Jaume Pujol, Carles Otero, Mikel Aldaba, Silvia Lopez-Bausili, Fernando Díaz-Doutón , et al. · 2018

New compact open-field double-pass system with asymmetric focus Open

A. Giner, M. Arjona, Fernando Díaz-Doutón, Mikel Aldaba, Carlos Guerra , et al. · 2018

Every day more people are using multifocal systems to correct presbyopia, as for example contact lenses or intraocular lenses. As a consequence, the necessity to do an appropriate characterization of their \noptical quality has increased. …

Effect of Experimental Conditions in the Accommodation Response in Myopia Open

Carles Otero, Mikel Aldaba, Fuensanta A. Vera‐Díaz, Jaume Pujol · 2017

SIGNIFICANCE The accommodative response is more affected by the type of refractive error than the method of stimulation, field of view (FOV), or stimulus depth. PURPOSE This study aims to analyze the effect of stimulation method, stimulus …

Effect of Experimental Conditions in the Accommodation Response in Myopia Open

Carles Otero, Mikel Aldaba, Fuensanta A. Vera‐Díaz, Jaume Pujol · 2017

SIGNIFICANCE The accommodative response is more affected by the type of refractive error than the method of stimulation, field of view (FOV), or stimulus depth. PURPOSE This study aims to analyze the effect of stimulation method, stimulus …

Tear film breakup time measurement based on corneal reflex interferences produced by dry spots. Open

Mikel Aldaba, Alejandro Mira-Agudelo, Carlos Guerra, John Fredy Barrera, Jaume Pujol · 2017

Suitability of open-field autorefractors as pupillometers and instrument design effects Open

Carles Otero, Mikel Aldaba, Oriol Ferrer, Andrea Gascón, Juan Carlos Ondategui Parra , et al. · 2017

All the instruments show similar repeat-ability. In all illumination conditions, agreement of Neuroptics with WAM-5500 and PowerRef II is not good enough, which can be partially induced due to their open field design.

Effect of apparent depth cues on accommodation in a Badal optometer Open

Carles Otero, Mikel Aldaba, Beatriz Martínez‐navarro, Jaume Pujol · 2017

A stimulus poor in depth cues inaccurately stimulates accommodation in Badal optometers; however, accommodation can be significantly improved in the same Badal optometer, when displaying a realistic image rich in peripheral depth cues, eve…

Does the Badal optometer stimulate accommodation accurately Open

Mikel Aldaba, Carles Otero, Jaume Pujol, David A. Atchison · 2017

Purpose To study whether the accommodation response to Badal optometer is equivalent to the response for real space targets. Methods Accommodative responses were measured for 28 young eyes with the WAM-5500 autorefractometer …

Does the Badal optometer stimulate accommodation accurately? Open

Mikel Aldaba, Carles Otero, Jaume Pujol, David A. Atchison · 2016

Purpose To study whether the accommodation response to Badal optometer is equivalent to the response for real space targets. Methods Accommodative responses were measured for 28 young eyes with the WAM ‐5500 autorefractometer in eight conf…

Response for light scattered in the ocular fundus from double-pass and Hartmann–Shack estimations Open

Carlos Guerra, Mikel Aldaba, Montserrat Arjona, Fernando Díaz-Doutón, Juan Antonio Martínez Roda , et al. · 2016

Double-pass (DP) and Hartmann-Shack (HS) are complementary techniques based on reflections of light in the ocular fundus that may be used to estimate the optical properties of the human eye. Under conventional data processing, both of thes…

Peripheral depth cues for accommodation stimulation Open

Carles Otero, Mikel Aldaba, Bea Martínez-Navarro, Jaume Pujol · 2016

On the usefulness of Badal optometer to stimulate accommodation Open

Mikel Aldaba, Jaume Pujol, Carles Otero · 2016

Spherical subjective refraction with a novel 3D virtual reality based system Open

Jaume Pujol, Juan Carlos Ondategui Parra, Llorenç Badiella, Carles Otero, Meritxell Vilaseca , et al. · 2016

Comparing Autorefractors for Measurement of Accommodation Open

Mikel Aldaba, Selena Gómez-López, Meritxell Vilaseca, Jaume Pujol, Montserrat Arjona · 2015

There is good agreement between subjective refraction and WAM-5500 measurements. In contrast, the PowerRef-II produced more hyperopic results. There were no differences among instruments at 2.50 D of static stimulation; however, difference…

Speckle reduction in double-pass retinal images using variable-focus lenses Open

Carlos Guerra, Mikel Aldaba, M. Arjona, Jaume Pujol · 2015

Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments b…

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