scholarly journals The effect of a Computer Lens Filter on visual performance in subjects with retinitis pigmentosa

2020 ◽  
Author(s):  
Zhangmei Guo ◽  
Lingzhi Ni ◽  
Na Lin ◽  
Yu Zhu ◽  
Longfei Jiang ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Contrast Sensitivity ◽  
Dark Adaptation ◽  
Reading Speed ◽  
Self Report ◽  
Visual Performance ◽  
Visual Comfort ◽  
Computer Screen ◽  
Vision Rehabilitation ◽  
Subjective Estimates

Abstract Background： Retinitis pigmentosa (RP) patients usually complain about nyctalopia and reduced dark adaptation which cause their visual discomfort. In this study we aimed to explore the effects of a UV reduction Computer Lens Filter (CLF) on contrast sensitivity (CS), reading speed for computer screen text and visual comfort in subjects with retinitis pigmentosa (RP) to find if a CLF is helpful for RP patients . Method: Twenty-two subjects diagnosed with binocular RP participated. Bright CS using the Mars test and reading speed for screen text were measured both with and without CLF wear. Subjective estimates of computer screen brightness and visual comfort were evaluated by Linkert self-report estimates. These functions were compared for the two conditions of filter wear and non-wear. Result ： Mean subject age was 38.2±7.5 years and mean logMAR VA was 0.505± 0.324. Wearing a CLF did not improve bright CS ( t = 0.680, P=0.504 ) or increase reading speed ( t =-0.223, P = 0.826 ). CLF wear was judged to reduce screen brightness ( t = -5.412, P<0.0001 ) and improve visual comfort ( t = 6.897, P<0.0001 ). Conclusion ： CLF wear did not improve RP subjects’ CS or reading speed for screen text, but did reduce the appearance of screen brightness and improve subjects’ reported visual comfort. Improvement in comfort alone may be sufficient justification for filter use as a vision aid for RP patients during vision rehabilitation.

scholarly journals The effect of a Computer Lens Filter on visual performance in subjects with retinitis pigmentosa

2019 ◽  
Author(s):  
Zhangmei Guo ◽  
Lingzhi Ni ◽  
Na Lin ◽  
Yu Zhu ◽  
Longfei Jiang ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Dark Adaptation ◽  
Reading Speed ◽  
Visual Performance ◽  
Visual Comfort ◽  
Computer Screen ◽  
Corrected Visual Acuity ◽  
Vision Rehabilitation ◽  
Subjective Estimates ◽  
Best Corrected Visual Acuity

Abstract Background：Retinitis pigmentosa (RP) patients uauslly complained nyctalopia and poor dark adaptation which caused their visual discomfort, in this study we aimed to explore the effects of a Computer Lens Filter (CLF) on contrast sensitivity (CS), reading speed for computer screen text and visual comfort in subjects with retinitis pigmentosa (RP), and to find wheather CLF would be helpful for RP patients . Method: Twenty-two subjects diagnosed with binocular RP participated. Bright CS using the Mars test and reading speed of screen text were measured using the spectacle corrections for best corrected visual acuity (BCVA) both with and without CLF wear. Subjective estimates of computer screen brightness and visual comfort were evaluated by questionnaire. These functions were compared for the two conditions of filter wear/non-wear. Result： Mean subject age was 38.2±7.5 years and mean log MAR VA was .45± .24. Wearing a CLF neither improved bright CS (t = .452, P=.653) nor increased reading speed (t =.414, P = .683). CLF wear was judged to reduce screen brightness (t = 5.412, P<.0001) and improve visual comfort (t = 6.897, P<.0001). Conclusion： CLF wear neither improved RP subjects’ CS nor reading speed for screen text but did reduce the appearance of screen brightness and improve subjects’ reported visual comfort. Improvement in comfort alone may be sufficient justification for filter use as a vision aid for RP patients during vision rehabilitation.

scholarly journals Visual Function and Macular Carotenoid Changes in Eyes with Retinal Drusen—An Open Label Randomized Controlled Trial to Compare a Micronized Lipid-Based Carotenoid Liquid Supplementation and AREDS-2 Formula

Nutrients ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3271
Author(s):  
Pinakin Gunvant Davey ◽  
Thomas Henderson ◽  
Drake W. Lem ◽  
Rebecca Weis ◽  
Stephanie Amonoo-Monney ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Dark Adaptation ◽  
Age Related Macular Degeneration ◽  
Visual Performance ◽  
Control Group ◽  
Open Label ◽  
Treatment Groups ◽  
Age Related ◽  
Retinal Drusen

Purpose: To compare the changes in visual and ocular parameters in individuals with retinal drusen who were treated with two commercially available nutritional supplements. Methods: An open-label, single-center, randomized, parallel-treatment with an observational control group design was utilized. The treatment groups included individuals with fine retinal drusen sub-clinical age-related macular degeneration (AMD), while the control group consisted of ocular normal individuals. The treatment groups were randomly assigned to the micronized lipid-based carotenoid supplement, Lumega-Z (LM), or the PreserVision Age-Related Eye Disease Study 2 (AREDS-2) soft gel (PV). Visual performance was evaluated using the techniques of visual acuity, dark adaptation recovery and contrast sensitivity, at baseline, three months, and six months. Additionally, the macular pigment optical density (MPOD) was measured. The control group was not assigned any carotenoid supplement. The right eye and left eye results were analyzed separately. Results: Seventy-nine participants were recruited for this study, of which 68 qualified and 56 participants had useable reliable data. Of the individuals who completed this study, 25 participants belonged to the LM group, 16 belonged to the PV group, and 15 to the control group. The LM group demonstrated statistically significant improvements in contrast sensitivity function (CSF) in both eyes at six months (p < 0.001). The LM group displayed a positive linear trend with treatment time in CSF (p < 0.001), with benefits visible after just three months of supplementation. Although there was a trend showing improvement in CSF in the PV group, the change was not significant after a Bonferroni-corrected p-value of p < 0.00625. Visual acuity, dark adaptation recovery and MPOD did not significantly improve in either treatment groups. Conclusion: The LM group demonstrated greater and faster benefits in visual performance as measured by CSF when compared to the PV group. This trial has been registered at clinicaltrials.gov (NCT03946085).

scholarly journals Post audio-visual biofeedback training visual functions and quality of life in paediatric idiopathic infantile nystagmus: A pilot study

2021 ◽  
pp. 112067212199104
Author(s):  
Monica Daibert-Nido ◽  
Yulia Pyatova ◽  
Michelle Markowitz ◽  
Maryam Taheri-Shirazi ◽  
Samuel N Markowitz
Keyword(s):  
Quality Of Life ◽  
Pilot Study ◽  
Contrast Sensitivity ◽  
Reading Speed ◽  
Biofeedback Training ◽  
Visual Functions ◽  
Infantile Nystagmus ◽  
Fixation Stability ◽  
Better Than

Purpose: Biofeedback training (BT) was adapted to idiopathic infantile nystagmus syndrome (IINS) cases to enhance visual functions and quality of life (QoL). Methods: 10 patients (age 9 ± 3.2 years) treated with the audio-visual BT module of the MAIA microperimeter (Centervue, Padova, Italy) were assessed in two baseline visits and 1week post-BT (BT 80 min in total). The outcomes were distance and near binocular best corrected visual acuity (BBCVA), fixation stability, reading speed, contrast sensitivity, stereopsis and Children’s Visual Function Questionnaire. One-way repeated measured ANOVA and paired t-tests were used. Results: Distance BBCVA improved from 0.46 ± 0.21 and 0.43 ± 0.18 pre-BT to 0.33 ± 0.2 logMAR post-BT ( F (2,27) = 13.75, p = 0.0002). Post-BT was better than baseline ( p = 0.0001) and pre-BT ( p = 0.001). Near BBCVA improved from 0.23 ± 0.09 and 0.21 ± 0.14 pre-BT to 0.04 ± 0.08 post-BT (F (2,27) = 22.12, p = 0.000014), post-BT was better than baseline ( p = 0.0001) and pre-BT ( p = 0.0006). Stereopsis improved from 283 ± 338″ to 39 ± 32.2″ ( p = 0.04), contrast sensitivity from 0.26 ± 0.17 to 0.08 ± 0.12 log units ( p = 0.01), and reading speed improved from 74.7 ± 51.2 wpm to 104.7 ± 53.6 wpm ( p = 0.0006). Fixation stability improved from 33.6 ± 28.1 to 14.3 ± 10.1 sq. QoL increased from 23.8 ± 2.2 to 26.3 ± 2.3 units ( p = 0.001). Conclusion: BT benefited all visual functions and QoL in this pilot study, heralding a new possibility for Low Vision Rehabilitation in IINS.

scholarly journals Night vision in barn owls: Visual acuity and contrast sensitivity under dark adaptation

2012 ◽  
Vol 12 (13) ◽  
pp. 4-4 ◽  
Author(s):  
J. Orlowski ◽  
W. Harmening ◽  
H. Wagner
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Dark Adaptation ◽  
Night Vision ◽  
Barn Owls

Effects of prolonged dark adaptation in patients with retinitis pigmentosa of Bothnia type: an electrophysiological study

2007 ◽  
Vol 116 (3) ◽  
pp. 193-205 ◽  
Author(s):  
Marie S. I. Burstedt ◽  
Ola Sandgren ◽  
Irina Golovleva ◽  
Lillemor Wachtmeister
Keyword(s):  
Retinitis Pigmentosa ◽  
Dark Adaptation ◽  
Electrophysiological Study

scholarly journals Visual performance in a flight simulator: multifocal intraocular lenses in pilots

2018 ◽  
Vol 3 (1) ◽  
pp. e000139
Author(s):  
Lee Lenton
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Luminance Contrast ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Flight Simulator ◽  
Night Time ◽  
Multifocal Intraocular Lenses ◽  
Low Luminance ◽  
Visual Tasks

ObjectiveTo compare the performance of adults with multifocal intraocular lenses (MIOLs) in a realistic flight simulator with age-matched adults with monofocal intraocular lenses (IOLs).Methods and AnalysisTwenty-five adults ≥60 years with either bilateral MIOL or bilateral IOL implantation were enrolled. Visual function tests included visual acuity and contrast sensitivity under photopic and mesopic conditions, defocus curves and low luminance contrast sensitivity tests in the presence and absence of glare (Mesotest II), as well as halo size measurement using an app-based halometer (Aston halometer). Flight simulator performance was assessed in a fixed-based flight simulator (PS4.5). Subjects completed three simulated landing runs in both daytime and night-time conditions in a randomised order, including a series of visual tasks critical for safety.ResultsOf the 25 age-matched enrolled subjects, 13 had bilateral MIOLs and 12 had bilateral IOLs. Photopic and mesopic visual acuity or contrast sensitivity were not significantly different between the groups. Larger halo areas were seen in the MIOL group and Mesotest values were significantly worse in the MIOL group, both with and without glare. The defocus curves showed better uncorrected visual acuity at intermediate and near distances for the MIOL group. There were no significant differences regarding performance of the vision-related flight simulator tasks between both groups.ConclusionsThe performance of visually related flight simulator tasks was not significantly impaired in older adults with MIOLs compared with age-matched adults with monofocal IOLs. These findings suggest that MIOLs do not impair visual performance in a flight simulator.

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