CooperVision’s MiSight 1 day soft contact lenses have demonstrated consistent retinal defocus in more prolate-shaped eyes commonly associated with higher myopia, according to a newly published study in the peer-reviewed journal Ophthalmic and Physiological Optics, the research journal for The College of Optometrists in the United Kingdom.
The performance was consistent with the optical profile that has been shown to slow myopia progression in powers to correct low and moderate levels of myopia.* 1
The findings contribute to the expanding research on optical interventions for myopia control.
This consistent level of myopic defocus helps ensure effective optical signalling, which is key to slowing myopia progression in wearers
Investigators evaluated teenagers and young adults who had high myopia (−6.50 to −9.25 D).† They found that accommodative behaviour remained stable fitted with single vision and dual focus lenses. This is particularly relevant as higher levels of myopia are often associated with larger accommodative lags.
Additionally, the work illustrated that MiSight 1 day achieved significant optical defocus across varying viewing distances and retinal regions. Measured retinal defocus within the annular treatment zone was approximately −2.00 D at the foveal centre, 10° nasal and temporal and 20° nasal and reduced to −1.90 (0.57) D at 20° temporal. This consistent level of myopic defocus helps ensure effective optical signalling, which is key to slowing myopia progression in wearers.
Paul Chamberlain, Senior Director of Research Programs at CooperVision and one of the paper’s authors said, “This study provides compelling evidence that MiSight 1 day delivers consistent defocus from the treatment zones across a wide range of myopia levels… The research marks the latest data in a years-long collaboration to overcome instrumentation limitations and develop a precise, advanced technique for measuring treatment impact.”
* Compared to a single vision 1 day lens over a 3 year period.
† Indications for use: MiSight 1 day (omafilcon A) soft (hydrophilic) contact lenses for daily wear are indicated for the correction of myopic ametropia and for slowing the progression of myopia in children with non-diseased eyes, who at the initiation of treatment are 8-12 years of age and have a refraction of -0.75 to -4.00 diopters (spherical equivalent) with ≤ 0.75 diopters of astigmatism. The lens is to be discarded after each removal.
Reference
1. Chamberlain P et al A 3-year Randomized Clinical Trial of MiSight Lenses for Myopia Control. Optom Vis Sci 2019;96:556?567
