Testing impacts of global blur profiles using a multiscale vision simulator
Although it is possible to specify the impact of blur at a specific retinal location, a lack of understanding exists regarding how the inhomogeneous blur distribution across the retina (i.e., global blur) affects the quality of an optical correction at a specific retinal location. To elucidate this...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-07-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584402030997X |
| _version_ | 1818115915812700160 |
|---|---|
| author | E. De Lestrange-Anginieur C.S. Kee |
| author_facet | E. De Lestrange-Anginieur C.S. Kee |
| author_sort | E. De Lestrange-Anginieur |
| collection | DOAJ |
| description | Although it is possible to specify the impact of blur at a specific retinal location, a lack of understanding exists regarding how the inhomogeneous blur distribution across the retina (i.e., global blur) affects the quality of an optical correction at a specific retinal location. To elucidate this issue, a multiscale visual simulator combining the projection of a controllable high-resolution stimulus and an ocular monitoring system was constructed to simultaneously simulate foveal and extrafoveal blurs. To define the range and capability of a wide-angle stimulation, an optimal working pupil was evaluated by optical ray-tracing via a Monte Carlo simulation, including optical variations corresponding to fixational eye movements. To investigate the impacts of global blur on the perception of discrete regions of the visual field, the bothersome blur threshold from five subjects was measured through this novel system using a collection of zonal blurs (annuli image projected sequentially at discrete retinal regions), and these impacts were compared with those using a spatially-varying blur (continuum of simultaneously projected zonal blurs of varying strengths, simulating retinal blur variations). Our results show that the zonal blur threshold does not entirely predict the global blur threshold, having a tendency to overestimate blur the threshold. It was concluded that, in addition to the amount of defocus present at a defined retinal location, the perception of individual defocused retinal regions can be affected by global blur. Given that blur tolerance can affect the perception of optically induced blurs, the findings provide useful implications for designing new optical correction. |
| first_indexed | 2024-12-11T04:14:13Z |
| format | Article |
| id | doaj.art-0855d3a1b6134f6b977d39b8bb3e1baa |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-11T04:14:13Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-0855d3a1b6134f6b977d39b8bb3e1baa2022-12-22T01:21:17ZengElsevierHeliyon2405-84402020-07-0167e04153Testing impacts of global blur profiles using a multiscale vision simulatorE. De Lestrange-Anginieur0C.S. Kee1School of Optometry, Hong Kong Polytechnic University, Hong Kong; Corresponding author.School of Optometry, Hong Kong Polytechnic University, Hong Kong; Interdisciplinary Division of Biomedical Engineering, Hong Kong Polytechnic University, Hong Kong SAR, ChinaAlthough it is possible to specify the impact of blur at a specific retinal location, a lack of understanding exists regarding how the inhomogeneous blur distribution across the retina (i.e., global blur) affects the quality of an optical correction at a specific retinal location. To elucidate this issue, a multiscale visual simulator combining the projection of a controllable high-resolution stimulus and an ocular monitoring system was constructed to simultaneously simulate foveal and extrafoveal blurs. To define the range and capability of a wide-angle stimulation, an optimal working pupil was evaluated by optical ray-tracing via a Monte Carlo simulation, including optical variations corresponding to fixational eye movements. To investigate the impacts of global blur on the perception of discrete regions of the visual field, the bothersome blur threshold from five subjects was measured through this novel system using a collection of zonal blurs (annuli image projected sequentially at discrete retinal regions), and these impacts were compared with those using a spatially-varying blur (continuum of simultaneously projected zonal blurs of varying strengths, simulating retinal blur variations). Our results show that the zonal blur threshold does not entirely predict the global blur threshold, having a tendency to overestimate blur the threshold. It was concluded that, in addition to the amount of defocus present at a defined retinal location, the perception of individual defocused retinal regions can be affected by global blur. Given that blur tolerance can affect the perception of optically induced blurs, the findings provide useful implications for designing new optical correction.http://www.sciencedirect.com/science/article/pii/S240584402030997XBiomedical engineeringOpticsBlurSpatial interactionIsoplanaticityVisual field |
| spellingShingle | E. De Lestrange-Anginieur C.S. Kee Testing impacts of global blur profiles using a multiscale vision simulator Heliyon Biomedical engineering Optics Blur Spatial interaction Isoplanaticity Visual field |
| title | Testing impacts of global blur profiles using a multiscale vision simulator |
| title_full | Testing impacts of global blur profiles using a multiscale vision simulator |
| title_fullStr | Testing impacts of global blur profiles using a multiscale vision simulator |
| title_full_unstemmed | Testing impacts of global blur profiles using a multiscale vision simulator |
| title_short | Testing impacts of global blur profiles using a multiscale vision simulator |
| title_sort | testing impacts of global blur profiles using a multiscale vision simulator |
| topic | Biomedical engineering Optics Blur Spatial interaction Isoplanaticity Visual field |
| url | http://www.sciencedirect.com/science/article/pii/S240584402030997X |
| work_keys_str_mv | AT edelestrangeanginieur testingimpactsofglobalblurprofilesusingamultiscalevisionsimulator AT cskee testingimpactsofglobalblurprofilesusingamultiscalevisionsimulator |