Two prototype myopia control soft contact lens designs with non-coaxial optics showed enhanced efficacy in one design and enhanced vision in the other, compared to dual-focus and single-vision designs. This initial data is for six months, and all myopia control contact lens designs showed close to 6/6 or 20/20 acuity equivalent.
This study showed that multi-zone spectacle and contact lenses used for myopia control provide myopic defocus at far distances. At near, changes in accommodative lag, pupil miosis and spherical aberration in individuals may mean there are lesser amounts of myopic defocus and reduced image quality. However, all the lenses were still able to provide sufficient image clarity at near for typical size print.
In young adult myopes, Biofinity centre-distance +2.50 Add and NaturalVue multifocal contact lenses both showed reduced visual acuity in lower lighting and low contrast conditions, and especially with a glare source, compared to single vision. Reading rate under normal lighting was also reduced by 4-8%. The multifocal designs performed similarly, although Biofinity required more over-refraction for best distance acuity.
In myopic children, interventions to slow progression are warranted to prevent the development of high myopia and subsequent pathology and also to reduce the economic burden caused by uncorrected and pathologic myopia. This IMI Report describes the latest advice on preventing the development and progression of myopia – read the summary here.
This study showed that aspheric multifocal soft contact lenses (Biofinity +2.50D and NaturalVue) reduce accommodative response and increase exophoria, while MiSight concentric dual-focus minimally impacts binocular vision function compared to single vision contact lenses. All myopia control contact lenses increased divergence range slightly but did not impact convergence.
Contact lens options are ideal for higher myopes. What about when they have moderate astigmatism as well? This case discusses the evidence base for myopia control options which correct for astigmatism, along with patient-specific considerations and whether a combination treatment with atropine is needed.