scholarly journals Retinal Responses to Simulated Optical Blur Using a Novel Dead Leaves ERG Stimulus

2021 ◽  
Vol 62 (10) ◽  
pp. 1
Author(s):  
Athanasios Panorgias ◽  
Stephanie Aigbe ◽  
Emily Jeong ◽  
Carles Otero ◽  
Peter J. Bex ◽  
...  
Keyword(s):  
Optical Blur

scholarly journals Contact lenses, the reverse Pulfrich effect, and anti-Pulfrich monovision corrections

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Victor Rodriguez-Lopez ◽  
Carlos Dorronsoro ◽  
Johannes Burge
Keyword(s):  
Processing Speed ◽  
Moving Objects ◽  
Contact Lenses ◽  
Three Dimensional ◽  
Effect Sizes ◽  
Reported Effect ◽  
Pulfrich Effect ◽  
Image Blur ◽  
Optical Blur ◽  
Large Magnification

Abstract Interocular differences in image blur can cause processing speed differences that lead to dramatic misperceptions of the distance and three-dimensional direction of moving objects. This recently discovered illusion—the reverse Pulfrich effect—is caused by optical conditions induced by monovision, a common correction for presbyopia. Fortunately, anti-Pulfrich monovision corrections, which darken the blurring lens, can eliminate the illusion for many viewing conditions. However, the reverse Pulfrich effect and the efficacy of anti-Pulfrich corrections have been demonstrated only with trial lenses. This situation should be addressed, for clinical and scientific reasons. First, it is important to replicate these effects with contact lenses, the most common method for delivering monovision. Second, trial lenses of different powers, unlike contacts, can cause large magnification differences between the eyes. To confidently attribute the reverse Pulfrich effect to interocular optical blur differences, and to ensure that previously reported effect sizes are reliable, one must control for magnification. Here, in a within-observer study with five separate experiments, we demonstrate that (1) contact lenses and trial lenses induce indistinguishable reverse Pulfrich effects, (2) anti-Pulfrich corrections are equally effective when induced by contact and trial lenses, and (3) magnification differences do not cause or impact the Pulfrich effect.

Effects of Induced Optical Blur on Infant Visal Acuity

1983 ◽  
Vol 60 (2) ◽  
pp. 100-105 ◽  
Author(s):  
ROGER L. BOLTZ ◽  
RUTH E. MANNY ◽  
BEVERLEY J. KATZ
Keyword(s):  
Optical Blur

scholarly journals Modified Conditional Generative Adversarial Network-Based Optical Blur Restoration for Finger-Vein Recognition

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 16281-16301 ◽  
Author(s):  
Jiho Choi ◽  
Kyoung Jun Noh ◽  
Se Woon Cho ◽  
Se Hyun Nam ◽  
Muhammad Owais ◽  
...  
Keyword(s):  
Generative Adversarial Network ◽  
Finger Vein ◽  
Adversarial Network ◽  
Vein Recognition ◽  
Optical Blur ◽  
Finger Vein Recognition

scholarly journals Short-Term Effect of Low-Dose Atropine and Hyperopic Defocus on Choroidal Thickness and Axial Length in Young Myopic Adults

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Beata P. Sander ◽  
Michael J. Collins ◽  
Scott A. Read
Keyword(s):  
Axial Length ◽  
Choroidal Thickness ◽  
Low Dose ◽  
Term Effect ◽  
Short Term ◽  
Short Term Effect ◽  
Ocular Biometry ◽  
Short Period ◽  
Fixed Order ◽  
Optical Blur

Purpose. To examine the interaction between a short period of hyperopic defocus and low-dose atropine upon the choroidal thickness and ocular biometrics of healthy myopic subjects. Methods. Twenty young adult myopic subjects had subfoveal choroidal thickness (ChT) and ocular biometry measurements taken before and 30 and 60 min following the introduction of optical blur (0.00 D and −3.00 D) combined with administration of 0.01% atropine or placebo. Each combination of optical blur and drug was tested on different days in a fixed order. Results. The choroid exhibited significant thinning after imposing hyperopic defocus combined with placebo (mean change of −11 ± 2 μm, p<0.001). The combination of hyperopic blur and 0.01% atropine led to a significantly smaller magnitude of subfoveal choroidal thinning (−4 ± 8 μm), compared to placebo and hyperopic defocus (p<0.01). Eyes treated with 0.01% atropine with no defocus exhibited a significant increase in ChT (+6 ± 2 μm, p<0.01). Axial length also underwent small but significant changes after treatment with hyperopic blur and placebo and 0.01% atropine alone (both p<0.01), but of opposite direction to the changes in choroidal thickness. However, the 0.01% atropine/hyperopic blur condition did not lead to a significant change in axial length compared to baseline (p>0.05). Conclusion. Low-dose atropine does inhibit the short-term effect of hyperopic blur on choroidal thickness and, when used alone, does cause a slight thickening of the choroid in young healthy myopic adults.

scholarly journals Estimation of macular pigment optical density in the elderly: Test–retest variability and effect of optical blur in pseudophakic subjects

2007 ◽  
Vol 47 (9) ◽  
pp. 1253-1259 ◽  
Author(s):  
Kevin T. Gallaher ◽  
Marco Mura ◽  
Wm. Andrew Todd ◽  
Tarsha L. Harris ◽  
Emily Kenyon ◽  
...  
Keyword(s):  
Optical Density ◽  
The Elderly ◽  
Macular Pigment ◽  
Macular Pigment Optical Density ◽  
Optical Blur

Effects of age and optical blur on real depth stereoacuity

2010 ◽  
Vol 30 (5) ◽  
pp. 660-666 ◽  
Author(s):  
Marcelo F. Costa ◽  
Sonia M. C. F. Moreira ◽  
Russell D. Hamer ◽  
Dora F. Ventura
Keyword(s):  
Optical Blur
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