Dry Eye, Visual Fatigue
Conditions
Keywords
visual fatigue, tear break-up time, dry eye, VDT syndrome, critical flicker fusion frequency
Brief summary
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.
Detailed description
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.
Interventions
BEHAVIORALcolor temperature change mode
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.
Sponsors
Beijing Tongren Hospital
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
PREVENTION
Masking
SINGLE (Subject)
Masking description
In order to eliminate the influence of subjective factors during the examination, this study was blinded only to the participant.
Intervention model description
This study is designed with a total of three groups, where participants will sequentially and randomly undergo all the intervention procedures.
Eligibility
Sex/Gender
ALL
Age
20 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* Adult population, regardless of gender. * Refractive error is less than or equal to -1.5D and both eyes achievecorrected visual acuity of 0.8 or higher. * Normal intraocular pressure with no organic pathology. * No apparent symptoms of dry eye. * Willing to cooperate to complete all the tests. * Voluntarily signing the informed consent form.
Exclusion criteria
* Individuals with strabismus and amblyopia exist. * Suffering from congenital eye conditions such as congenital cataracts or congenital retinal diseases. * Those who have undergone intraocular surgery (such as cataract removal, intraocular lens implantation, etc.). * Individuals with refractive media opacity (such as corneal lesions, lens opacity, etc.). * Only one eye meets the inclusion criteria. * Active corneal infections such as bacterial, fungal, viral, or other acute or chronic anterior segment inflammations. * Currently using medications that may lead to dry eye or affect vision and corneal curvature. * Other ocular conditions, such as dacryocystitis, eyelid disorders and abnormalities, abnormal intraocular pressure, and glaucoma. * Unable to undergo regular eye examinations.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Critical flicker fusion frequency | 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. | 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Visual fatigue | 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. | 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. |
| tear break-up time | 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. | 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 |
| Measurement of Accommodative Sensitivity with Flip-Chart Post-VDT Tasks | 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. | 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. |
Countries
China
Outcome results
None listed