Shamir Aspheric Ophthalmic Lenses (MyLens) for Myopic Control Clinical Trial

The Hong Kong Polytechnic University

Status

Terminated

Conditions

Myopia

Treatments

Device: Aspheric lens

Study type

Interventional

Funder types

Other

Industry

Identifiers

NCT02700139

HSEARS20160105001

Details and patient eligibility

About

The aim of this clinical trial is to compare the rate of myopic progression in children wearing aspheric (MyLens) and spherical/ toric ophthalmic lenses. The proposed lens design is an aspheric lens which is supposed to slow myopic progression in children by unique asphericity (proprietary information). Myopic progression is quantified by changes in axial length (AL) and cycloplegic refractive error (Rx) will be monitored for 6-12 months (6 months crossover) with double-masking. Peripheral refraction and ocular aberration will be evaluated.

Full description

Visual manipulation induced by progressive addition lenses (PALs) have been shown to inhibit eye growth and myopia development in children with up to 11% to 21% efficacy compared to single vision lenses. However, the treatment effect of PALs is statistically significant but clinically insufficient. The current study aims at investigating the use of spectacle lenses with a unique novel design for myopia control in children. This prospective one-year randomized clinical study will evaluate axial elongation and myopia progression in eyes using the novel lens design compared to those using the conventional single-vision design. It is a double-masked, cross-over study. One eye will be fitted with the study lens and the other eye will be fitted with the single-vision lens. Subjects will be asked to wear the spectacles for 6 months and the two lens designs will be swapped in the next 6 months after a wash-out period of 2 weeks. Both the subjects and examiners will not aware the lens design being used by the subjects in each phase.

Enrollment

61 patients

Sex

All

Ages

6 to 12 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Myopia between 0.75 ~ - 4.50 D and with-the-rule astigmatism not more than 1.50 D
Difference between eyes, no more than 1.25 spherical equivalent
Best corrected visual acuity (VA) is equal to or better than 0.10 in logMAR scale (Snellen VA 6/7.5 or better)
Eyes straight at distance and near with best subjective correction
Willing to be randomized and wear the study spectacles according to the instructions from practitioner
Willing to come back for follow up in the Optometry Clinic during the study period

Exclusion criteria

Abnormal ocular and general health
Prior myopic treatment (e.g. refractive surgery and progressive lens wear for myopic control) before and during the study period
History of rigid contact lenses (including orthokeratology lenses) wearing
Systemic condition which might affect refractive development (for example, Down syndrome, Marfan's syndrome)
Ocular conditions which might affect the refractive error (for example, cataract, ptosis).