Short-Term Influence of Alcohol on Spatial Brightness Contrast Sensitivity

1988 ◽  
Vol 197 (3) ◽  
pp. 159-165 ◽  
Author(s):  
M. Zulauf ◽  
J. Flammer ◽  
C. Signer
Keyword(s):  
Contrast Sensitivity ◽  
Brightness Contrast ◽  
Short Term

Spatial Brightness Contrast Sensitivity Measured with White, Green, Red and Blue Light

1988 ◽  
Vol 196 (1) ◽  
pp. 43-48 ◽  
Author(s):  
M. Zulauf ◽  
J. Flammer ◽  
C. Signer
Keyword(s):  
Contrast Sensitivity ◽  
Blue Light ◽  
Brightness Contrast

scholarly journals Influence of Lenslet Configuration on Short-Term Visual Performance in Myopia Control Spectacle Lenses

2021 ◽  
Vol 15 ◽  
Author(s):  
Xue Li ◽  
Chenglu Ding ◽  
Yuhao Li ◽  
Ee Woon Lim ◽  
Yi Gao ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Random Order ◽  
Optical Quality ◽  
Visual Performance ◽  
Modulation Transfer ◽  
Short Term ◽  
Spatial Frequencies ◽  
Full Correction ◽  
The Right ◽  
Myopia Control

Purpose: This study aimed to evaluate short-term visual performance and optical quality of three different lenslet configurations on myopia control spectacle lenses.Materials and Methods: This study utilized a cross-over design. Distance visual acuity (VA) was measured in 50 myopic children; contrast sensitivity (CS) was measured in 36 myopic children. For each test, four spectacle lenses were evaluated in a random order: single-vision lens (SVL), lens with concentric rings of highly aspherical lenslets (HAL), lens with concentric rings of slightly aspherical lenslets (SAL), and lens with honeycomb configuration of spherical lenslets (HC). The modulation transfer function (MTF) and MTF area (MTFa) were used to determine optical quality. All tests were performed monocularly on the right eye with full correction.Results: HAL and SAL had larger MTFa than HC. VA in lenses with lenslets was significantly reduced compared to SVL (all p < 0.01). The reduction in VA was worse with HC than with SAL (p = 0.02) and HAL (p = 0.03); no effect of lenslet asphericity was found (p > 0.05). VA changes induced by lenslets showed no correlation with spherical equivalent refraction (all p > 0.05) and were weakly positively associated with age for SAL (r = 0.36, p = 0.01) and HC (r = 0.31, p = 0.03), but not for HAL (p = 0.30). The area under the log contrast sensitivity function (AULCSF) decreased with HAL and HC (all p < 0.001) in all illumination levels, and AULCSF with HAL was higher than that with HC in a photopic condition (1.17 ± 0.10 vs. 1.10 ± 0.13, p = 0.0004). The presence of lenslets did not affect CS at 3 cycles per degree (cpd) (p = 0.80). At 6 to 18 cpd, CS was significantly reduced by HAL and HC (all p < 0.05), but not SAL (p > 0.05) compared to SVL. At high spatial frequencies (>12 cpd) both SAL and HAL reduced CS significantly less than HC (all p < 0.01).Conclusion: Short-term visual performance was minimally impaired by looking through the lenslet structure of myopia control spectacle lenses. Concentric rings with aspherical lenslets had a significantly lower impact on both VA and CS than honeycomb configuration with spherical lenslets.

Short-term hypobaric hypoxia enhances visual contrast sensitivity

Neuroreport ◽  
2002 ◽  
Vol 13 (8) ◽  
pp. 1063-1066 ◽  
Author(s):  
Krisztina Benedek ◽  
Szabolcs K??ri ◽  
Andor Gr??sz ◽  
Zsolt T??tka ◽  
Erika T??th ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Hypobaric Hypoxia ◽  
Short Term ◽  
Visual Contrast ◽  
Visual Contrast Sensitivity

scholarly journals Short-Term Changes in Light Distortion in Orthokeratology Subjects

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Elena Santolaria Sanz ◽  
Alejandro Cerviño ◽  
Antonio Queiros ◽  
Cesar Villa-Collar ◽  
Daniela Lopes-Ferreira ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Optical Quality ◽  
Sensitivity Function ◽  
Spherical Equivalent ◽  
Short Term ◽  
High Frequencies ◽  
Corneal Aberrations ◽  
Quality Degradation ◽  
Spatial Frequencies ◽  
Distortion Parameters

Purpose. Quantifying adaptation to light distortion of subjects undergoing orthokeratology (OK) for myopia during the first month of treatment.Methods. Twenty-nine healthy volunteers (age: 22.34 ± 8.08 years) with mean spherical equivalent refractive error −2.10 ± 0.93D were evaluated at baseline and days 1, 7, 15, and 30 of OK treatment. Light distortion was determined using an experimental prototype. Corneal aberrations were derived from corneal topography for different pupil sizes. Contrast sensitivity function (CSF) was analyzed for frequencies of 1.50, 2.12, 3.00, 4.24, 6.00, 8.49, 12.00, 16.97, and 24.00 cpd under photopic conditions.Results. Average monocular values of all light distortion parameters measured increased significantly on day 1, returning to baseline after 1 week (P<0.05in all cases). Spherical-like aberration stabilized on day 7 for all pupil diameters, while coma-like for smaller pupils only. CSF was significantly reduced on day 1 for all spatial frequencies except for 1.5 cpd, returning to baseline afterwards. Significant correlation was found between light distortion and contrast sensitivity for middle and high frequencies (P<0.05) after 15 days.Conclusion. Despite consistently increased levels of corneal aberrations, light distortion tends to return to baseline after one week of treatment, suggesting that neural adaptation is capable of overcoming optical quality degradation.

scholarly journals The Effects of 0.01% Atropine on Adult Myopes’ Contrast Sensitivity

2021 ◽  
Vol 15 ◽  
Author(s):  
Ziyun Cheng ◽  
Jianhui Mei ◽  
Suqi Cao ◽  
Ran Zhang ◽  
Jiawei Zhou ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Low Dose ◽  
Randomized Study ◽  
Eye Drops ◽  
Short Term ◽  
Myopia Progression ◽  
Significant Interaction Effect ◽  
Corrected Visual Acuity ◽  
To Receive

PurposeAtropine at a low concentration is considered a safe and effective treatment to mitigate myopia progression. However, the potential unwanted side effects of administering atropine at a low dose on visual functions other than best corrected visual acuity has not been investigated. In this study, we investigate the short-term (12,16, and 20 h) and long-term (1, 2, and 4 weeks) effects of 0.01% atropine (i.e., 0.1 mg/ml) on contrast sensitivity (CS) in patients with myopia.MethodsThirty adults (23.33 ± 2.93 years old) with myopia between -1.00 and -6.00 diopters (D), astigmatism of -1.50 D or less, and anisometropia of 1.00 D or less, participated in this prospective, masked, placebo-controlled, randomized study. The participants were randomly assigned to receive 0.01% atropine or polyvinyl alcohol eye drops once nightly to both eyes for four weeks. CS was measured binocularly at baseline and 12, 16, 20 h, 1, 2, and 4 weeks after the first use of the eye drops.ResultsThere was no statistically significant differences of CS found between atropine and placebo-controlled groups in both short-term and long-term. There was no statistically significant interaction effect found between the time and group.ConclusionWe demonstrated no significant deleterious effect of 0.01% atropine on adult myopes’ CS.

Short-term effects of intravitreal bevacizumab in contrast sensitivity of patients with diabetic macular edema and optimizing glycemic control

2019 ◽  
Vol 149 ◽  
pp. 170-178 ◽  
Author(s):  
Augusto A.L. Motta ◽  
Maria Teresa B.C. Bonanomi ◽  
Daniel A. Ferraz ◽  
Rony C. Preti ◽  
Raafay Sophie ◽  
...  
Keyword(s):  
Glycemic Control ◽  
Macular Edema ◽  
Contrast Sensitivity ◽  
Diabetic Macular Edema ◽  
Intravitreal Bevacizumab ◽  
Short Term ◽  
Short Term Effects

Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter
Keyword(s):  
Working Memory ◽  
Rapid Serial Visual Presentation ◽  
Language Comprehension ◽  
Short Term Memory ◽  
Visual Presentation ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

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