Evaluation of New Color Temperature Adjustment Mode in Preventing Dry Eye and Visual Fatigue

Capital Medical University

Status: Invitation-only

Conditions: Visual Fatigue; Dry Eye

Treatments: Behavioral: color temperature change mode

Study type: Interventional

Funder types: Other

Identifiers

NCT07201493

TREC2025-KY185

Details and patient eligibility

About

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.

Full 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.

Enrollment: 25 estimated patients

Sex: All

Ages: 20 to 30 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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25 participants in 3 patient groups

6500K group

No Intervention group

Description:

This is the group that performs visual evoked tasks using conventional color temperature mode of whose vaule is 6500K. In this group, the impact of the same text content on the visual fatigue and comphrehensive analysis of tear film were assessed, including but not limited to indicators such as blinking detection, visual function and so on.

sigmoid change group

Experimental group

Description:

This is the group that performs visual evoked tasks using dynamic color temperature change mode 1 which changes from 6500K to 4000K. In this group, the impact of the same text content on the visual fatigue and comphrehensive analysis of tear film were assessed, including but not limited to indicators such as blinking detection, visual function and so on.

Treatment:

Behavioral: color temperature change mode

gradient change group

Experimental group

Description:

This is the group that performs visual evoked tasks using dynamic color temperature change mode 2 which changes from 6500K to 4000K. In this group, the impact of the same text content on the visual fatigue and comphrehensive analysis of tear film were assessed, including but not limited to indicators such as blinking detection, visual function and so on.

Treatment:

Behavioral: color temperature change mode