Abstract
PurposeTo investigate whether the severity of symptoms of visual fatigue might be associated with clinical visual measures and basic visual functions, such as accommodation, vergence, and contrast sensitivity.MethodsIn this study, 104 students were recruited (25 males, 79 females, Age 23.4 ± 2.5) for this study. Those with high myopia, strabismus, anisometropia, eye disease or history of ophthalmological surgery were excluded. The included subjects completed a questionnaire that assesses the severity of visual fatigue. Then, binocular accommodative facility, vergence facility and contrast sensitivity using a quick contrast sensitivity function approach were measured in a random sequence. Next, the correlations between each symptom of visual fatigue in the questionnaire and accommodative facility, vergence facility and contrast sensitivity were examined.ResultsFactor analysis indicated that visual fatigue, as captured by the scores of a subset of the questionnaire items, could be strongly related to binocular accommodative facility and binocular contrast sensitivity, but not to vergence facility. We also found that binocular accommodative facility and contrast sensitivity at high spatial frequencies are related.ConclusionOur findings suggest that visual fatigue is related to the ability of human observers to encode visual details through their binocular vision.
Highlights
Visual fatigue refers to a group of somatic or perceptive symptoms that usually occur following using a computer, reading, or other performing near visual activities (Bhanderi et al, 2008)
There was no significant difference in area under the log CSF curve (AULCSF), Low CSF, Mid CSF, and High CSF
We investigated whether there is an association between the scores of the questionnaire about visual fatigue and results from clinical visual measurements
Summary
Visual fatigue refers to a group of somatic or perceptive symptoms that usually occur following using a computer, reading, or other performing near visual activities (Bhanderi et al, 2008). The prevalence of visual fatigue is 12.4-32.2% in children below 18 years (Ip et al, 2006; Sterner et al, 2006; Tiwari et al, 2011; Tiwari, 2013) and 46–71% in university students around the world (Bhanderi et al, 2008; Han et al, 2013; Hashemi et al, 2019). Common symptoms of visual fatigue are blurred vision, diplopia, and illusory movement or flicker of words at a near viewing distance. These characteristics are related to near vision and binocular anomalies (Chen, 1986; Sheedy et al, 2003; Blehm et al, 2005; García-Muñoz et al, 2014).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
