At Fremont Eye Centre, we offer different options for nearsightedness control. Dynamic lenses by Hoya, MyoVision lenses by Zeiss, bifocal lenses and multifocal contact lens are good alternatives to orthokeratology (ortho-K) to reduce nearsighted progression in children.
Nearsightedness is the most common refractive error of the eyes making distance vision blurry. It is common in children especially when they are growing. When the eyeballs become longer, it creates a mismatch between the refractive power of the eye and the length of the eyeball.
For children who would develop high levels of nearsightedness, slowing down the progression could mean a lower prescription giving clearer vision, thinner glasses lenses and more options with contact lens wear. In addition to lower prescription, it also yields a lower incidence of retinal detachment and glaucoma, both of which are associated with high level of nearsightedness.
Orthokeratology, also known as corneal reshaping therapy, is a specialty contact lens fitting using a gas permeable contact lenses worn overnight to change the corneal curvature, thus modifying the cornea’s refractive power. Combining its unique advantage of providing clear unaided vision during daytime, orthokeratology induces an effective peripheral power profile that control eye growth and hence controlling nearsightedness. Orthokeratology has become one of the most popular and effective choices among children for myopic (nearsightedness) control.
Dynamic lenses by Hoya are specialized lenses mounted on an eyeglasses frame. Similar to progressive, these lenses provide extra functional accommodation to relax the eyes. The goal of relaxing the eyes is to minimize eyeball elongation which ultimately increase nearsightedness.
Yang Z, Lan W, Ge J, Liu W, Chen X, Chen L, et al. The effectiveness of progressive addition lenses on the progression of myopia in Chinese children. Ophthal Physiol Opt. 2009;29:41–48.
Similar to Dynamic lenses, MyoVision™ lenses are specialized lenses mounted on an eyeglasses frame. They are worn for all visual activities including reading and distance vision. Research has shown that MyoVision™ lenses reduce progression of myopia by an average of 30% in children from age of 6 to 16 with at least one nearsighted parent.
Sankaridurg et al, Optometry and Vision Science, Vol 87, No. 9, September 2012.
Similar to Dynamic lenses, Bifocal lenses are a combination of reading glasses and distance glasses. The upper portion of the glasses contains distance power while the lower portion contains reading power. By relaxing the eyes through the reading portion, we slow down progression of nearsightedness by minimizing eyeball elongation.
Goss DA. Effect of bifocal lenses on the rate of childhood myopia progression. Am J Optom Physiol Optics. 1986;63:135–141.
Developed by Cooper Vision, MiSight is a soft daily disposable contact lenses worn during daytime. Not only does it optically correct existing myopia, giving clear distance and near vision, but MiSight has also been proven to slow the progression of myopia in most children.
Multifocal soft contact lenses are usually used for people older than 40 who have presbyopia or reading problems. It has been shown that multifocal soft contact lenses slows down myopia progression by around 50% in several studies. Although your child would be wearing contact lens, the risk of the eye infection is significant less than overnight hard contact lens wear like ortho-k.
Walline J, Greiner K, McVey E, Jones-Jordan L. Multifocal contact lens myopia control Optom Vis Sci 201390(111207–1214.1214Post Editor Corrections, 12 September 2013.