Effect of Colour Temperature of Reading Lamp on Refractive Error Development

February 28, 2024 updated by: Dr CHOI Kai Yip, The Hong Kong Polytechnic University
This is a 12-month longitudinal randomized controlled trial aiming to evaluate the effect of colour temperature of reading lamp on refractive error development.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Myopia has reached epidemic in the world, especially in East Asia. The proportion of myopic population increases drastically during schoolage. Lack of light exposure has been suggested to be a risk for myopia development, in which additional reading lamp may alleviate this condition. However, the effect of colour temperature of the reading lamp is unknown on childhood refractive error development. In this study, investigators will randomly allocate school-aged children into groups, who will receive reading lamps of different colour temperatures for their daily use. The participants' refractive error and axial length will be evaluated.

Study Type

Interventional

Enrollment (Estimated)

798

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Hong Kong
    • Kowloon
      • Hong Kong, Kowloon, Hong Kong, 000000
        • Recruiting
        • Optometry Research Clinic
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

4 years to 18 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • aged between 4 and 18 years

Exclusion Criteria:

  • have received myopia control intervention

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Supportive Care
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: 3000K
Participants will receive a reading lamp of colour temperature 3000K.
Device: 3000K Reading lamp
Reading lamp with custom-made circuitry to emit light of 3000K colour temperature
Active Comparator: 4500K
Participants will receive a reading lamp of colour temperature 4500K.
Device: 4500K Reading lamp
Reading lamp with custom-made circuitry to emit light of 4500K colour temperature
Active Comparator: 6500K
Participants will receive a reading lamp of colour temperature 6500K.
Device: 6500K Reading lamp
Reading lamp with custom-made circuitry to emit light of 6500K colour temperature

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cycloplegic refraction
Time Frame: up to 12 months
Refractive error in diopter by autorefractor
up to 12 months
Axial length
Time Frame: up to 12 months
Length of the eyeball in millimeter by partial coherence interferometer
up to 12 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Colour vision
Time Frame: up to 12 months
Ability to distinguish colours (pass/fail & severity of defect) measured by pseudoisochromatic plates
up to 12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The Hong Kong Polytechnic University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 1, 2022

Primary Completion (Estimated)

June 30, 2025

Study Completion (Estimated)

June 30, 2027

Study Registration Dates

First Submitted

February 6, 2023

First Submitted That Met QC Criteria

February 14, 2023

First Posted (Actual)

February 17, 2023

Study Record Updates

Last Update Posted (Estimated)

March 1, 2024

Last Update Submitted That Met QC Criteria

February 28, 2024

Last Verified

February 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 00000

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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