The Children's WEAR Trial(Phase 1&2)

The Children's WEAR (Wearability and Evaluation of Adjustable Refraction) Trial(Phase 1&2)

Phase I: Focus groups on different designs of adjustable glasses and standard glasses (August-September 2012) Phase II: Two-month randomized trial comparing four groups: (September 2012 - August 2013)

Phase I: Focus groups on different designs of adjustable glasses and standard glasses (August-September 2012) Phase II: Two-month randomized trial comparing four groups: self-refraction with adjustable glasses, receiving custom standard glasses; subjective refraction by an expert refractionist after cycloplegic automated refraction and receiving custom standard glasses; subjective refraction by a rural refractionist after cycloplegic automated refraction, receiving custom standard glasses; and subjective refraction by an expert refractionist after cycloplegic automated refraction receiving ready made glasses (September 2012 - August 2013)

Inclusion Criteria:

phase1: - aged 12-17 years

• with <= -1.00D of myopic refractive error in each eye phase2: - 12-15 years old children from two locations in Guangdong Province
• with uncorrected vision </= 6/12 in at least one eye thought to be due to refractive error (that is, correctable to at least 6/7.5 with cycloplegic subjective refraction by an optometrist)

Exclusion Criteria:

• those corrected VA can not up to 6/7.5 with cycloplegic subjective refraction by an optometrist
• those with significant strabismus or vision abnormality (keratopathy, cataract, vitreous macular diseases ), or with vision deficiency ( amblyopia ) children are to be excluded.
• Children developing acquired vision problems other than myopia