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Lights, Camera, Action … Smile!
Published in Rebekah Davies, Navigating Telehealth for Speech and Language Therapists, 2023
As odd as these phrases sound, they are a phenomenon and can really affect engagement virtually. Visual hygiene and noise isn't about how clean your spectacles are, although in all seriousness it really does help to make sure,You can see the screen well enough.Where possible have glasses that are coated to reduce glare, especially if you are a screen user for a large amount of your time and to enhance the view for the individuals on the other side of the screen.
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Published in Ken Addley, MCQs, MEQs and OSPEs in Occupational Medicine, 2023
Best fit. Visible radiation (light) lies between the infrared and ultraviolet portion of the electromagnetic spectrum. The retina is most sensitive to blue light (400–750 nm) and damage may be structural, thermal or photochemical. Lasers can cause pressure-induced (mechanical) retinal damage as well as thermal. Individuals with aphakia (but not cataracts) are more susceptible to retinal damage and should wear spectacle filters when working in bright environments. Glare and insufficient lighting can cause eye strain, eye irritation, visual fatigue and headache which is more likely in those over 40 years of age. Symptoms are transient.
Lutein in Neural Health and Disease
Published in Robert E.C. Wildman, Richard S. Bruno, Handbook of Nutraceuticals and Functional Foods, 2019
Visual perception and cognition are highly related.127 Both visual dysfunction and poor cognition can occur with increasing age, although the relationship between the two is not well defined. In a cross-sectional analysis of two national data sets, NHANES (1999–2002) and the National Health and Aging Trends Study (NHATS, 2011–2015), vision dysfunction at distance and based on self-reports was associated with poor cognitive function.128 This underlies the importance of visual function in the maintenance of cognition. Indeed, MPOD is related to a number of visual performance parameters.129,130 Lutein supplementation in cataract patients was associated with improvements in visual acuity and reductions in glare sensitivity after a 2-year supplement.33 Stringham and Hammond measured changes in photostress recovery and glare disability after supplementing young healthy subjects with 12 mg of lutein and zeaxanthin per day for 6 months. Supplementation led to direct improvements in glare disability and photostress.130 A detailed analysis of how MP improves visibility reports a likely reduction in the veiling effects of blue haze, leading to the potential to see about 30% farther through the atmosphere compared to someone with little or no MP.131
Post-concussion Syndrome Light Sensitivity: A Case Report and Review of the Literature
Published in Neuro-Ophthalmology, 2022
Mohammad Abusamak, Hamzeh Mohammad Alrawashdeh
Photophobia is regarded to be among the most challenging neuro-ophthalmological disorders to manage since there are no large randomised controlled trials to guide management.1 Dark-coloured and tinted lenses for photosensitivity related to concussion have been tested, with 85% of patients reporting improvement.3 Additionally, some behavioural adjustments, such as using polarised sunglasses, anti-glare covers for electronic devices, and non-liquid crystal display displays, may help alleviate light sensitivity.21 Sunglasses may reduce photophobia, but their usage indoors is discouraged since they will worsen dark adaptation. Tinted lenses, such as FL-41, filter out light at the 480 nm wavelength, which has been shown to benefit a large number of patients since this is the wavelength at which ipRGCs are most sensitive.19 In addition, the frequent use of topical ocular lubricants is advised.16
Performance of a new device for the clinical determination of light discomfort
Published in Expert Review of Medical Devices, 2020
Robert Montés-Micó, Alejandro Cerviño, Noelia Martínez-Albert, José V. García-Marqués, Sarah Marie
Glare is the loss of visual performance or discomfort caused by an intensity of light in the visual field above the intensity threshold to which the eyes are adapted, and can be therefore subdivided into discomfort and disability glare. Disability glare is a well-known consequence of intraocular straylight. Intraocular light scatter is light that has reflected, refracted, diffracted, or experienced multiple combinations of all three from particles along the optical path of travel [19]. Fan-Paul et al. [20] highlighted the fact that glare and disability glare are often confused in the literature. Glare refers to the light source whereas disability glare corresponds to the reduction in visual performance due to a glare source and is the result of forward light scattering [21]. Considering that scattered light causes contrast loss in the final retinal image, the estimation of straylight becomes very important in clinical applications, such as diagnosing patients with complaints caused by large light scattering in the eyes such as lens opacities or corneal turbidity after laser corneal surgery [22–24]. The principles behind it are well known, and several clinical devices have been developed over the years to evaluate straylight and disability glare [24–26] and other related light disturbances [24].
The effects of reflected glare and visual field lighting on computer vision syndrome
Published in Clinical and Experimental Optometry, 2019
Chao‐wen Lin, Feng‐ming Yeh, Bo‐wen Wu, Chang‐hao Yang
Glare is an important visual problem and may worsen the symptoms of computer vision syndrome. The increment in the visual fatigue questionnaire score was significantly greater when the visual task was performed in an environment with a glare light source. The visual complaints on the glare questionnaire were also significantly greater in an environment with a glare light source. The scores on both questionnaires confirmed that glare causes visual discomfort in computer users by increasing visual fatigue and the sensation of dazzle.