What is ortho-k?
Ortho-k is an optical method for vision correction for myopes. The effect is due to changes of the corneal shape using specially designed rigid gas permeable lenses. It is a temporary measure and nighty ortho-k lens wear is necessary to maintain the effect. Once lens wear is discontinued, the myopic corrective effect will be lost. Scientific research has proven ortho-k can slow down the myopic progression in children by about 50% per year when compared to children just wearing single vision optical lenses.
Who is suitable to wear ortho-k lens?
- Children at least with 7 years of age, better with 8 years of age.
- Myopia below -5.50D and astigmatism below -1.50D. If the myopia or astigmatism is above the limit, children may need to wear spectacles in day time to correct the residual refractive error.
- Children who have very rapid myopic progression, -0.75D to -1.00D progression or above per year is considered as fast.
- Adults who are not suitable in performing LASIK or have very dry eye when wearing contact lenses.
Wearing any type of contact lenses will increase risk of corneal infection, ortho-k wearers and parents should strictly follow the instructions given by the optometrist to ensure good ocular health.
Low Dose AtropineThere is scientific research showing that the myopic progression in children who used low dose atropine every night was slower those who did not by about 50-60% per year. Atropine is a pupil dilation eye drops and has to be prescribed by ophthalmologists. Long term use may lead to photosensitivity, reduced intra-ocular muscle strength, pupil dilation and some unknown ocular health issues.
Bifocal or Progressive Multifocal GlassesResults of research using multifocal glasses in an attempt to slow down the myopic progression vary from 15% to 40% per year. Such a high discrepancy may be due to the fact that children are less compliant to use the lower reading portion of the multifocal glasses when doing near work.
Specially Designed Daily Disposable Soft Contact LensesUsing a contact lens design known as “Peripheral Defocus”, research shown that it can slow down the myopic progression by about 30% per year. The disadvantages are inability to correct astigmatism and increase risk of corneal infection.
Having Good Visual HygieneApart from the above optical and pharmacological methods, different literature has pointed out that outdoor activities and appropriate amount of sunlight exposure can slow down the myopic progression. Parents should also always remind their kids the 20-20-20 rules, which is every 20 minutes of near work, focus something 20 feet away for at least 20 seconds. Too much near work is definitely one of the main culprits causing rapid myopic progression.
Swisscoat Vison Center – Children Myopia Control serviceOur experienced optometrist will ensure the health of your children eyes and recommend the most appropriate solution to slow down myopia progress . Book a consultation today with our professional team to find out more about our Myopia control service for your kids
Appointment : +852 35794763