The purpose of this study was to investigate the effects of visual fatigue and dry eye level under different correlated color temperature modes, and to evaluate the effect of new designed dynamic color temperature change modes on the improvement of visual fatigue and dry eye level.
The effect of electronic display devices on visual fatigue of human eyes was the primary evaluation index and the primary outcome index of this experiment. Secondary outcome indicators were tear film break-up time, tear lipid analysis, conjunctival congestion score and subjective visual fatigue score. Other outcome indicators were eyeblink detection, accommodative function and Schirmer test. Baseline values of the above metrics were measured separately before each group of trials and then, after 50 minutes of e-text reading, specific values of the different metrics were collected when using different color temperature modes and all valid measurements were statistically compared and analysed. To assess the effect of new designed dynamic color temperature change modes on reducing visual fatigue and dry eye symptoms.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
25
Subjects are asked to read a terminal display device for 50 minutes, featuring texts with different color temperature mode treatments. Specifically, they will read the same text content for 50 minutes with different color temperature mode. The participants will complete a total of 2 sets of tests in a random order.
Beijing Tongren Hospitol,Capital Medical University,, Beijing, Beijing/China
Beijing, Beijing Municipality, China
Critical flicker fusion frequency
Critical flicker fusion frequency was measured before and after the task by a flicker fusion frequency detection device to assess changes in the degree of ocular fatigue. To compare the difference in CFF after wearing anti-blue glasses with normal glasses and to evaluate the effect of anti-blue glasses in preventing asthenopia.
Time frame: Participants underwent three randomized experimental conditions through study completion, an average of 1 months. For each condition, CFF test was administered at baseline (pre-experiment) and post-task,totaling six completions per participant.
Visual fatigue
The visual fatigue questionnaire utilized in this study consists of a self-report survey with a total of 16 items. It is designed to comprehensively assess the severity of visual fatigue symptoms, with a scoring system ranging from 0 to 4. Higher scores indicate more severe symptoms, encompassing three primary domains: ocular symptoms, visual discomfort, and psychological aspects triggered by visual fatigue.
Time frame: Participants underwent three randomized experimental conditions through study completion, an average of 1 months. For each condition, visual fatigue test was administered at baseline and post-task,totaling six completions per participant.
tear break-up time
This clinical study included tear film breakup time measurement using keratograph-7000,OCULUS immediately after each VDT task, reflecting tear film stability, and evaluating the degree of dry eye
Time frame: Participants underwent three randomized experimental conditions through study completion, an average of 1 months. For each condition, CFF test was administered at baseline (pre-experiment) and post-task,totaling six completions per participant.
Measurement of Accommodative Sensitivity with Flip-Chart Post-VDT Tasks
This clinical study involves the assessment of accommodative sensitivity for both monocular and binocular vision using a flip-chart immediately following each VDT task. The measurement will quantify the number of optotypes correctly identified within one minute, indicative of the subject's accommodative capacity.
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Time frame: Participants underwent three randomized experimental conditions through study completion, an average of 1 months. For each condition, CFF test was administered at baseline (pre-experiment) and post-task,totaling six completions per participant.