Inclusion Criteria:  be aged between 7 to 14 completed years (7 and 14 years inclusive), irrespective of gender. have cycloplegic autorefraction spherical component -0.50 D to - 4.50D, cylinder no more than -1.50D be accompanied by parents/guardians who can read and comprehend Vietnamese and give informed consent as demonstrated by signing a record of informed consent. be willing to comply with the wearing and clinical trial visit schedule as directed by the Investigator. have ocular health findings considered to be "normal". be correctable to at least 6/9.5 (20/30) or better in each eye with spectacles. be willing to wear the spectacles provided by the investigators for all waking hours;  Exclusion Criteria:  A known allergy to, or a history of intolerance to tropicamide or topical anaesthetics; Strabismus and/or amblyopia; Had previous eye surgery (including strabismus surgery); Any ocular, systemic or other condition or disease with possible associations with myopia or affecting refractive development e.g. Marfan syndrome, retinopathy of prematurity, diabetes; Had any ocular injury or condition (including keratoconus and herpes keratitis) of the cornea, conjunctiva or eyelids; Worn bifocals or progressive addition spectacles; Worn orthokeratology or bifocal contact lenses; Current orthoptic treatment or vision training; Any anatomical, skin or other condition that would impact on the wearing of spectacles; Use of or a need for concurrent category S3 and above ocular medication at enrolment and/or during the clinical trial. Concurrently enrolled in another clinical trial.