Myopia controlMyopia in HK
Causes of myopia
Daily disposable CL
Spectacles lenses for myopic control
There are three types of spectacles lenses design for myopia control. Your optometrist would choose the most suitable one for you. Choosing a unsuitable lenses design will just wast money and time.
Progressive lens is originally used to treat presbyopia for reading. When children wearing progressive lenses, the lenses can release children accommodation when reading by lower portion of the lens. Therefore, to maximize the effect, eyes should turn down to look at the bottom of the lens while reading.
A study showed that progressive lens is only effective for children with Esophoria, it can slow down the myopic progression around 38%.
2. Bifocal lens
Bifocal lens work similar to that of progressive lens, but a optical prism power added to the lower part of the lens for reading to enhance the effect of myopic control. Studies showed that reduction of myopic progression is about 62% by using bifocal lens.
3. Lens with periphery blur theory
A new designed optical lens with a periphery blur zone is believed to be useful in slowing down myopic progression. Accurate measurements of position of the lens relative to position of clients’ eyes is the key point to success. To a certain extent, it is more easy to use than progressive lens and bifocal lens, however, studies showed it is not a effective method for myopic control.
- Cheng D, Woo GC, Drobe B, Schmid KL. (2014) Effect of bifocal and prismatic bifocal spectacles on myopia progression in children: three-year results of arandomized clinical trial. JAMA ophthalmology, Vol.132(3), pp.258-64
- Cheng D, Schmid KL, Woo GC, Drobe B. (2010). Randomised Trial of Effect of Bifocal and Prismatic BifocalSpectacles on Myopic Progression: Two-Year Results. Arch Ophthalmol, 128, 12-19.
- Sankaridurg P, Donovan L, Varnas S, Ho A, Chen X, Martinez A, Fisher S, Lin Z, Smith EL, Ge J, Holden B.(2010) Spectacle lenses designed to reduce progression of myopia: 12-month results. Optometry and vision science : official publication of the American Academy of Optometry. Vol.87(9), pp.631-41