FAQs About Contact Lenses

What are high water content lenses?
As mentioned above, soft lenses soak up water, and it it this water which allows the eye to "breathe" through the contact lens. Therefore the more water you can make the lens soak up then the easier it is for the Oxygen to pass through it. The original soft contact lenses are now often referred to as "Low Water Content" soft lenses and contain roughly 38% water when hydrated. Manufacturers have spent time and resources perfecting the use of plastics used in lenses and as a a result the water content has risen. A lot of lenses now contain between 50% and 60% water and some contain over 70%. The amazing thing is that only 30% of a 70% water content lenses is actually plastic Lenses having over 65% water content are generally considered to be "High Water Content", while those between 50% and 65% are called "Mid Water Content" lenses.

What are contact lenses?
What are "Hard" and "Soft" lenses?
Why does the cornea need Oxygen?
What are high water content lenses?
Why aren't all soft lenses high water content?
Do gas permeable contact lenses absorb water?
Which lenses are best?
What is astigmatism?
I have astigmatism - can I wear soft lenses?
What is presbyopia?
I have presbyopia - can I wear contact lenses?
What are disposable lenses?
Why are contact lens solutions needed?
Do I need to use protein-removing tablets?
Which solution is best for my lenses?
I've been told not to wear my lenses when in an aeroplane - why?
Can I swim in my contact lenses?
Do I still need spectacles if I wear contact lenses?
What is the difference between tinted and coloured lenses?

See also:
All About Contact Lenses
All About Vision
How to make a complaint