Effect of Colour Temperature of Reading Lamp on Refractive Error Development

Refractive Errors Clinical Trial

Official title:

Effect of Colour Temperature of Reading Lamp on Refractive Error Development

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05733182
• Other study ID #: 00000
• Status: Recruiting
• Phase: N/A
• Start date: July 1, 2022
• Est. completion date: June 30, 2027

Study information

• Verified date: February 2024
• Source: The Hong Kong Polytechnic University
• Contact: Kai Yip Choi, PhD
• Phone: (852)34002934
• Email: kaiyip.choi[@]polyu.edu.hk
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a 12-month longitudinal randomized controlled trial aiming to evaluate the effect of colour temperature of reading lamp on refractive error development.

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.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 798
• Est. completion date: June 30, 2027
• Est. primary completion date: June 30, 2025
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 4 Years to 18 Years

Eligibility

Inclusion Criteria:

• aged between 4 and 18 years

Exclusion Criteria:

• have received myopia control intervention

Related Conditions & MeSH terms

• Refractive Errors

Intervention

Device:
• 3000K Reading lamp
Reading lamp with custom-made circuitry to emit light of 3000K colour temperature
• 4500K Reading lamp
Reading lamp with custom-made circuitry to emit light of 4500K colour temperature
• 6500K Reading lamp
Reading lamp with custom-made circuitry to emit light of 6500K colour temperature

Locations

Country	Name	City	State
Hong Kong	Optometry Research Clinic	Hong Kong	Kowloon

Sponsors (1)

Lead Sponsor	Collaborator
The Hong Kong Polytechnic University

Country where clinical trial is conducted

Hong Kong, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Cycloplegic refraction	Refractive error in diopter by autorefractor	up to 12 months
Primary	Axial length	Length of the eyeball in millimeter by partial coherence interferometer	up to 12 months
Secondary	Colour vision	Ability to distinguish colours (pass/fail & severity of defect) measured by pseudoisochromatic plates	up to 12 months