The NaturalVue Multifocal Contact Lens - Astigmatism 'masking' or 'correcting'?
In this article:
Optical treatments for myopia control include spectacles and contact lenses. Contact lens options for myopia control are attractive because generally their myopia control efficacy has been shown to be better than progressive addition and bifocal spectacles.1
Two daily disposable soft CL options have been researched and commercially released for myopia control - Visioneering Technologies' NaturalVue Multifocal,3 and CooperVision's MiSight.4
Astigmatism 'masking' or 'correcting'?
The child to be fitted with contact lenses in this case has 1D of astigmatism. RH asked if any lens could 'mask' this astigmatism, and the majority of the commenters suggested NaturalVue.
How should we manage astigmatism in contact lenses?
Trial lens fitting, with at least 10 minutes of settling time, is recommended in the NaturalVue Multifocal CL fitting guide. The three-step fitting guide also states the importance of refracting the patient to 6/5 (20/15) and then inputting their full sphero-cylindrical refraction into the QuickStart Calculator to optimize the chances of adaptation and fitting success.
Take home messages:
- The NaturalVue Multifocal contact lens is purported to be suitable for patients up to 2D of astigmatism, provided good acuity is maintained. This is recommendation is a lot higher than typical multifocal CL designs, likely due to a 'partial correction' offered by the unique optical design.
- 'Masking' of astigmatism in spherical CLs is not considered to be successful, but the terminology persists.
- Trial lens fitting and following the manufacturer's fitting guides will allow the best chance to assess the impact of uncorrected astigmatism when fitting a spherical multifocal lens like NaturalVue.
Meet the Authors:
About Connie Gan
Connie is a clinical optometrist from Kedah, Malaysia, who provides comprehensive vision care for children and runs the myopia management service in her clinical practice.
About Kimberley Ngu
Kimberley is a clinical optometrist from Perth, Australia, with experience in patient education programs, having practiced in both Australia and Singapore.
This content is brought to you thanks to unrestricted educational grant from
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- Morgan PB, Efron SE, Efron N, Hill EA. Inefficacy of aspheric soft contact lenses for the correction of low levels of astigmatism. Optom Vis Sci. 2005 Sep;82(9):823-8. (link)
- Cho P, Cheung SW, Mountford J, White P. Good clinical practice in orthokeratology. Cont Lens Anterior Eye. 2008 Feb;31(1):17-28. (link)
- Chen C, Cheung SW, Cho P. Myopia control using toric orthokeratology (TO-SEE study). Investigative ophthalmology & visual science. 2013 Oct 1;54(10):6510-7. (link)
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