Effect of Diffusion Optics Technology (DOT) Spectacle Lenses on Choroidal Thickness

Inclusion Criteria:

• Are 8-14 years of age;

• Are able to read (or be read to), understand and sign the assent document;

• Are accompanied by a parent or legal guardian who is able to read, understand andsign the parental information and permission document;

• Are emmetropic by non-cycloplegic auto-refraction, which means both refractivemeridians should be within +1.00D and -1.00D inclusively;

• Are willing and able to follow instructions.

Exclusion Criteria:

• Are participating in any concurrent interventional clinical or research study;

• Have a history of myopia control treatment in the past year;

• Have amblyopia in either eye or known to have any other binocular vision disorder,such as accommodative insufficiency;

• Have any known active ocular disease and/or infection;

• Have a systemic condition that in the opinion of the investigator may affect a studyoutcome variable. Examples include diabetes mellitus, hyperthyroidism;

• Are using any systemic or topical medications that in the opinion of theinvestigator may affect a study outcome variable. Examples include Atropine eyedrops;

• Have undergone strabismus surgery, refractive error surgery or intraocular surgery;

• Are a child of a member of the study team.