Central and peripheral refraction measured by a novel double-pass instrument

Christaras, Dimitrios; Tsoukalas, Spyridon; Papadogiannis, Petros; Börjeson, Charlie; Volny, Moa; Lundström, Linda; Artal, Pablo; Ginis, Harilaos

doi:10.1364/boe.489881

Cited by 4 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A Shack-Hartmann wavefront sensor (SHWFS) is developed based on the classical Hartmann wavefront measurement method, with the advantages of simple installation, compact structure, reliable algorithm, and fast measurement speed [1]. It has been widely used in astronomical observation [2], biomedical imaging [3,4], high-energy laser beam quality testing [5], space communication systems [6], and optical tweezers [7]. In principle, SHWFS utilizes the microlens array (MLA) to sample the incident wavefront to produce a spot array pattern, computes the relative offset of the spot centroid, and then reconstructs the wavefront using the algorithm.…”

Section: Introductionmentioning

confidence: 99%

Higher-resolution wavefront sensing based on sub-wavefront information extraction

Guan,

Zhao,

Wang

et al. 2024

Front. Phys.

View full text Add to dashboard Cite

The limited spatial sampling rates of conventional Shack–Hartmann wavefront sensors (SHWFSs) make them unable to sense higher-order wavefront distortion. In this study, by etching a known phase on each microlens to modulate sub-wavefront, we propose a higher-resolution wavefront reconstruction method that employs a modified modal Zernike wavefront reconstruction algorithm, in which the reconstruction matrix contains quadratic information that is extracted using a neural network. We validate this method through simulations, and the results show that once the network has been trained, for various atmospheric conditions and spatial sampling rates, the proposed method enables fast and accurate high-resolution wavefront reconstruction. Furthermore, it has highly competitive advantages such as fast dataset generation, simple network structure, and short prediction time.

show abstract

Section: Introductionmentioning

confidence: 99%

Higher-resolution wavefront sensing based on sub-wavefront information extraction

Guan,

Zhao,

Wang

et al. 2024

Front. Phys.

View full text Add to dashboard Cite

show abstract

Comparison of optical myopia control interventions: effect on peripheral image quality and vision

Papadogiannis

Börjeson

Lundström

2023

Biomed. Opt. Express

Self Cite

View full text Add to dashboard Cite

This study compares the effects on peripheral vision and image quality of four myopia control interventions: a) Perifocal spectacles/ArtOptica, b) Stellest spectacles/Essilor), c) MiyoSmart spectacles/Hoya and d) MiSight contact lenses/CooperVision. Five subjects participated with habitual or no correction as reference. Three techniques were used: 1) Hartmann-Shack sensors for wavefront errors, 2) double-pass imaging system for point-spread-functions (PSF), and 3) peripheral acuity evaluation. The results show that multiple evaluation methods are needed to fully quantify the optical effects of these myopia control interventions. Perifocal was found to make the relative peripheral refraction (RPR) more myopic in all subjects and to interact with the natural optical errors of the eye, hence showing larger variations in the effect on peripheral vision. MiSight had a smaller effect on RPR, but large effect on peripheral vision. Stellest and MiyoSmart also showed small effects on RPR but had broader double-pass PSFs for all participants, indicating reduced retinal contrast. Reduction in peripheral retinal contrast might thereby play a role in slowing myopia progression even when the peripheral refraction does not turn more myopic.

show abstract

Visual and Physiological Optics: introduction to the joint feature issue in Biomedical Optics Express and Journal of the Optical Society of America A

Tabernero¹

2023

Biomed. Opt. Express

View full text Add to dashboard Cite

This feature issue collects articles presented at the tenth Visual and Physiological Optics meeting (VPO2022), held August 29–31, 2022, in Cambridge, UK. This joint feature issue between Biomedical Optics Express and Journal of the Optical Society of America A includes articles that cover the broad range of topics addressed at the meeting and examples of the current state of research in the field.

show abstract

Central and peripheral refraction measured by a novel double-pass instrument

Cited by 4 publications

References 26 publications

Higher-resolution wavefront sensing based on sub-wavefront information extraction

Higher-resolution wavefront sensing based on sub-wavefront information extraction

Comparison of optical myopia control interventions: effect on peripheral image quality and vision

Visual and Physiological Optics: introduction to the joint feature issue in Biomedical Optics Express and Journal of the Optical Society of America A

Contact Info

Product

Resources

About