No.
The lenses are made out of highly gas permeable material
which allows lots of oxygen through to the cornea. The design of OrthoK lenses is such
that there is a large Tear pool under the lens which helps make them comfortable. For
patients who have never worn Rigid lenses before, we suggest that they wear them for about
2 hours on the night before they first sleep in the lenses.
Some Contact Lenses are designed to be slept in. It
is only dangerous to sleep in lenses which are designed for daily wear.
You sleep in the lenses and remove them in the morning.
You will be able to see for the rest of the day without spectacles or contact lenses.
The change in your prescription should last between 24 and
36 hours.
Most patients need to wear their lenses every day. Some
can wear them every other day
If you are careful, Gas Permeable lenses can last up to 2
years.
No. The change is gradual over 2-3 days. If you do find
that your vision in the evening is not as good as in the morning you have 2 choices.
- Wear the lenses for slightly longer in the morning before
you take them out, i.e. for an extra hour
- Wear the lenses in the evening. they are powered to
behave link a normal contact lens.
Most of the prescription change occurs in the first night.
If you need some extra help we can give you daily disposable lenses for a couple of
days.
Each practitioner decides on the level of their fees and
so you must consult with them.
Look at our membership list,
choose a practitioner near to you and give them a ring.
Although it has been practised for about 30 years in USA,
it was unreliable and unpredictable. Recent advances in lens design and equipment
mean that it now works reliably and predictably.
The technique is very complicated and the equipment
required very expensive. It takes up a lot of chair time and so most practitioners prefer
to fit the easier types of lenses
Generally OrthoK is not recommended after surgery but each case must be assessed by your
optometrist.
A number of practitioners have had good results
correcting residual myopia following refractive surgery.
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