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Soft Contact Lenses
Soft contact lenses are
hydrophilic or "water loving". Their water content ranges
from 25% to 75% for different applications.
Soft contact lenses offer
the following advantages:
- Comfortable
- Quick adaptation to
wearing
- Flexible wearing times
- Correction of most vision
problems
- Simple and easy care
& hygiene
- Ability to change or
enhance eye colour.
Soft contact lenses are available as conventional
lenses which usually last for 12 to 18 months using a care system
which usually consists of separate solutions for cleaning, rinsing,
disinfection & storage; or as disposable
soft lenses, including extended wear, daily-disposable
lenses and as tinted
soft lenses.
Part or all of the cost of contact lenses is covered
by your Health Fund if you have private
health insurance.
Rigid Contact Lenses
Rigid, or hard, contact
lenses are less comfortable initially but do offer specific advantages
for some eye and vision problems:
- Able to correct problems which cannot be treated with soft lenses such as keratoconus or high degrees of astigmatism.
- More durable and longer
life.
- Easier to insert and remove.
Your optometrist will advise
you which contact lens type is most appropriate for you.
Disposable Contact Lenses
Disposable contact lenses are a sub-group within
soft contact lenses. They provide improved eye health by the planned
replacement of lenses before problems with lens aging and deposits
can develop. These lenses have been made possible by improved methods
of production which have lowered the cost to a point where disposability
is affordable.
Different types of disposable contact lenses are
replaced on a schedule of 1 day, 2 weeks or 1 month.
Since the lenses do not have to last so long,
the care and cleaning procedures are much simpler and are usually
based upon a convenient 1-bottle system for cleaning, disinfection
& storage.
Disposable lenses are available in a wide variety of tints which enhance or change eye colour .
Daily Disposable Contact Lenses
Disposable contact lenses have now progressed
to the ultimate in disposability: Daily-disposables are worn
once and discarded. There are no solutions required since the lenses
never need to be stored.
Daily disposable contact lenses are proving especially
popular with people who want to wear them as an occasional option
for social wear or sport.
Extended Wear Contact Lenses:
Extended wear lenses can be worn for up to 30 days without lens removal
or cleaning since they allow greater quantities (up to 6 times more) of
oxygen to reach the eye compared to older generations of lenses. Wearers save on solutions
since the lenses do not need to be removed and cleaned each night .
Wearers love the convenience of being able to wake up in the middle of
the night and being able to see without the need to look for their
glasses.
Multifocal Contact Lenses:
It has always been difficult to produce a contact lens which can
provide distance and near prescriptions yet new designs have made this possible.
Tinted & Coloured Contact Lenses
Soft contact lenses are also available in tints
and colours. These fall in to 3 main categories:
Visibility Tints
to make it easier to see and handle the contact lenses. These are
usually a pale blue and included in the lenses at no extra charge
Transparent Tints
which are used to work with and enhance the patient's own natural
eye colour. For example: to make a hazel eye greener
Cosmetic Tints which
are used to cover and completely change the patients own eye colour.
For example: to make brown eyes blue.
Contact Lens Care Guidelines
Contact Lens Cleaning
Safety is enhanced significantly by rubbing and rinsing contact lenses prior to and following storage. Do not use water or peroxide based solutions to rinse contact lenses before inserting-ask your Optometrist if in doubt.
If you drop a lens, clean and rinse before insertion.
Lens Case Cleaning
Lens case hygiene is extremely important. Potentially harmful micro-organisms can grow inside of your case. The inside of the case should be cleaned with disinfecting solution and left to air dry after every use.
Dispose of your old case and replace at least every 3 months.
Disinfecting Solution
Replace the disinfecting solution every time you clean the lens. Never top-up or add additional solution to the solution that is already in the case.
Replace Open Bottles of Solutions Every 3-Months.
When the lenses have been stored for more than seven days, replace the solution regardless of whether the lenses have been worn or not.
Wash Your Hands
Contact Lenses should always be handled with cleaned, washed and dry hands. Preferably use an appropriate (non-moisturising, non-residue) soap or disinfectant and dry your hands with lint free tissues or a clean cloth.
Water
Never use tap water to store, clean or rinse your contact lenses or lens case. Water is a common source of micro-organisms that can produce sight threatening eye infections.
Avoid splashing water directly into your eyes while wearing your contact lenses.
Storing your contact lenses in the bathroom carries a higher risk of airborne contamination with bacteria.
Holidays and Swimming
One of the high risk occasions of infections is when going on holiday. An appropriate travel kit should be carried and used which minimises exposure of the contact lenses to contaminants , eg. airborne, bathroom surfaces.
Make sure you have enough solution, a clean case and a pair of spectacles whenever you travel.
Always keep your spectacles up to date in case of a broken or lost contact lens or in the case of an infection.
Another high-risk occasion for contact lens wearers is exposure to potential contaminants from the beach, swimming pool or spa water. Goggles should be worn while swimming with lenses or they should be removed.
After swimming, lenses should be cleaned and disinfected before re-insertion.
Saliva
Do not allow saliva to come into contact with your lenses, lens case or swimming goggles as it is a potential source of contamination.
Sleeping with Contact Lenses
Never sleep in your contact lenses unless they have been specifically prescribed for extended wear. If you have been advised by your Optometrist that you are able to sleep in your lenses:
* Do not sleep in your lenses if you feel unwell. Eg. If you have cold or fly symptoms.
* It is recommended that lenses worn on an extended basis are removed at least once a week to be cleaned.
* It is recommended that you have a night off at least once per week where the lenses are removed, cleaned and left to disinfect in the lens case.
Every Day
Check that your eyes look good, feel good and see well. If not, contact your Optometrist immediately.
Professional Advice
Ask your contact lens practitioner if you have any questions about your lens care.
Seek professional advice immediately and remove your contact lenses if your eyes become red or sore.
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