The Effect of Blue-light Filtering Spectacle Lenses on Myopia Progression in Schoolchildren

Does Blue-light Filtering Spectacle Lens Promote Myopia Progression in Schoolchildren

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03538002

Enrollment

148

Registered

2018-05-25

Start date

2018-09-10

Completion date

2021-11-30

Last updated

2022-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Myopia

Keywords

blue light filtering spectacle lens

Brief summary

The purpose of this study is to investigate if the blue-light filtering spectacle lenses promote myopia progression in schoolchildren.

Detailed description

The effect of blue light on ocular health has been studied extensively. Shorter wavelength such as blue light could cause damage to the retina. The damage was more evident in the ageing eye. Since the tablets and mobile with blue LED backlight display are widely used, thus blue-light filtering spectacle lenses are now available in the market. However, whether this kind of lenses could affect the eye growth in schoolchildren is unknown. This study is then designed to investigate if the blue-light filtering spectacle lenses affect myopia progression in Hong Kong Chinese schoolchildren. The schoolchildren will be randomly allocated to either blue-light filtering spectacle lens group (treated) or conventional spectacle lens group (control). Their axial length and refraction will be monitored every 6 months for 2 years. The changes between two group will then be compared.

Interventions

DEVICEBlue-light filtering spectacle lenses

This is a single vision spectacle lens for correction of distant refractions and filtering out the blue light by providing anti-blue light coating.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

8 Years to 13 Years

Healthy volunteers

Yes

Inclusion criteria

* Refraction: myopia of -1.00 dioptres (D) to -5.00D * Astigmatism: equal or less than -1.50D * Anisometropia: equal or less than 1.00D * Best corrected monocular visual acuity: 0.0 LogMAR or better after full correction * Parents' understanding and acceptance of random allocation of grouping

Exclusion criteria

* any ocular and systemic abnormalities might affect visual functions or refractive development * prior treatment of myopic control, e.g. drugs, orthokeratology, progressive addition lenses, bifocal lenses, drugs (e.g. atropine), etc.

Design outcomes

Primary

Measure	Time frame	Description
Cycloplegic refraction	2 years	Refraction done under cycloplegia

Secondary

Measure	Time frame	Description
Axial length	2 years	Length of eyeball that is directly related to myopia

Countries

Hong Kong

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026