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NCT Number: NCT05733182

Effect of Colour Temperature of Reading Lamp on Refractive Error Development

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

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Key information

Conditions

Refractive Errors Eye Diseases Myopia

Age range

4 year–18 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Optometry Research Clinic

Hong Kong, Kowloon, 000000

Location status: Recruiting

Location contact

Kai Yip Choi, PhD

CONTACT

[email protected]

(852)34002934

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • aged between 4 and 18 years

Exclusion criteria

  • have received myopia control intervention

Treatment and study plan

3000K Reading lamp

Device

Reading lamp with custom-made circuitry to emit light of 3000K colour temperature

4500K Reading lamp

Device

Reading lamp with custom-made circuitry to emit light of 4500K colour temperature

6500K Reading lamp

Device

Reading lamp with custom-made circuitry to emit light of 6500K colour temperature

Primary outcomes

  1. Cycloplegic refraction

    Time frame: up to 12 months

    Refractive error in diopter by autorefractor

  2. Axial length

    Time frame: up to 12 months

    Length of the eyeball in millimeter by partial coherence interferometer

Secondary outcomes

  1. Colour vision

    Time frame: up to 12 months

    Ability to distinguish colours (pass/fail & severity of defect) measured by pseudoisochromatic plates

Study contacts

Contact information is provided by the study sponsor or research team.

Kai Yip Choi, PhD

CONTACT

[email protected]

(852)34002934

Sponsors and collaborators

Lead sponsor

The Hong Kong Polytechnic University

Other

Registry information

Important dates

Study start
2022
Primary completion
2025
Study completion
2027
First posted
Feb 17, 2023
Registry last updated
Mar 1, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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