Myopia & MyoVision Lenses
What is Myopia?
Myopia is an eye condition not a disease. In essence, myopia occurs when the eye is too long or the lens system of the eye is too strong. A person with myopia can see near objects clearly but has blurred vision when looking at distant objects. This is why myopia is referred to as ‘nearsightedness’.
Although there are different forms of myopia, myopia is commonly described by the ages at which it manifests itself:
- Very small percentages (1% to 2%) of children are born with myopia, known as Congenital Myopia.
- Most common is Youth Onset Myopia, which can be identified amongst children between the ages of 6 and 16 years. The population affected by this form of myopia varied by country- between 10% and 80%.
- Adult onset Myopia, which is divided into ‘Early Onset’ and ‘Late Onset’, affects a relatively small proportion of the population-between 5% and 8%.
What Causes Myopia?
Research indicated that myopia is caused by a combination of ‘nature’ and ‘nurture’.
There is evidence that myopia is to a significant degree genetically determined. For example, is has been demonstrated that if one or both parents are myopic, there is a statistically higher probability that the child will also develop myopia. In addition, prevalence is far higher amongst Japanese, Chinese and Korean children than amongst children in Europe, the USA or Africa.
Increased levels of education, income level and urbanisation are contributing to a dramatic increase in myopia. For example, it has been shown that there is a much higher level of myopia amongst living in big cities, than in children living in rural environments.
Environmental factors contributing to myopia:
Levels of near work, such as reading
Near working distance
Time watching TV
Time spent at the computer
Time spent outdoors/indoors
Traditional myopia corrections
The most widely used method for correcting myopia is traditional spectacle lenses. Traditional minus lenses correct for your child’s vision by placing the image on the retina, allowing your child to see clearly. However they will not delay the progression of your child’s myopia.
Contact lenses are used by some 10% to 15% of the population who need vision correction, mostly in the age group of 15 to 40 year olds.
MyoVision by ZEISS
MyoVision by ZEISSis the world’s first single vision spectacle lenses proven to delay myopia progression by an average of 30%, when compared to traditional spectacle lenses.
It is a patented lens design with the revolutionary ‘Peripheral Vision Management Technology’ which has been clinically proven in wearer trials co-ordinated by Vision CRC Australia and conducted by Sun Yat-sen University, China.
MyoVision by ZEISS was developed following research that demonstrates the link between peripheral retinal image blur and myopia progression. MyoVision has been designed to provide sharp foveal vision while managing peripheral imaging through a unique and patented novel lens design.
This means that a child, who would normally have a prescription of -6.00D by the time he or she reached the age of 18, would now only have a prescription of -4.00D thanks to using MyoVision lenses – a truly amazing result. MyoVision by ZEISS lenses look like normal lenses and are comfortable to wear. Like all lenses, they may require a short adaption period.
A 12 month wearer efficacy trial amongst 210 Chinese school children resulted in slowing down the progression of myopia by an average of 30% in a subgroup of younger children (6 to 12 years old) with at least one myopic parent.
Getting the most from MyoVision
Aside from using MyoVision Lenses for your child, there are other things you can do for your child which will help restrain the progression of myopia.
- Get your child wearing lenses as early as possible.
- Make sure that your child wears the lenses continuously. MyoVision’s Peripheral Vision Management Technology has been developed and tested for all-day wear.
- It is important to explain to the children that they may experience slight blurred vision when turning their eyes away from the optical centre. This is easily overcome by turning their heads in the direction of the gaze.
- We recommend that you take your child back to your eye care practitioner every 6 months to ensure that the correction prescription is maintained.
- Tell your child not to look too close during near vision tasks. He or she should read no close than 30 centimetres. When watching TV, the minimum recommended distance is 3 metres.
- Good lighting is a must for all activities
- During near visual tasks, such as reading and computing, it is important to take a 2-minute break every 30 minutes. During this break your child should look in the distance at an object as far away as possible, for example, if you live in an apartment, go to the window and look out as far as possible towards the horizon.
- No more than a reasonable amount of recreation time spent on TV, computers and electronic hand help games.
- A minimum of 1 hour a day spent outdoors. Time spent outdoors is important in controlling myopia and the child should ideally be actively engaged in distance vision activities. Sporting activities which involve distance vision are soccer, tennis, athletics etc.
Alternative approaches to Myopia
- Children’s progressive lenses
Although children’s progressive lenses do slow down myopia progression, the effect is small and inconsistent.
Ortho-K is the use of hard contact lenses to flatten the shape of the cornea while sleeping. It requires careful attention and hygiene.
- Pharmaceutical eye drops
Some studies have proven that the use of Atropine and Perenzipine eye drops do achieve a reduction in the progression of myopia. The long-term side effects of these drugs are not yet understood.
- LASIK Refractive Surgery
LASIK is a surgical procedure which changes the curvature of the cornea to correct for myopia. It is only conducted on adults after myopia has stabilised.