The high oxygen transmissibility
allows up to five times more oxygen through the lens than traditional soft contact lenses, for white healthy looking eyes," Dr Mahmoud highlighted.
With an oxygen transmissibility
level of 175, Focus NIGHT&DAY extended wear lenses transmit the industry's highest amount of oxygen to the eye's cornea.
They are made of balafilcon A, with revolutionary AerGel(TM) technology for excellent oxygen transmissibility
, and the Performa(TM) surfacing technology that creates a consistent wettable surface for optimal visual acuity and comfort.
For lathe manufactured soft and rigid lenses, practitioners need to decide on which contact lens material is most suitable for any given patient with regard to oxygen transmissibility
and water content.
New promotional materials, supported by clinical data previously provided to the FDA, have been developed emphasizing the product's high oxygen transmissibility
, which, among other things, allows for low levels of overnight corneal swelling.
The contact lens oxygen transmissibility
(Dk/t) required for no contact lens induced corneal oedema in open-eye and closed-eye conditions is estimated at 35 x [10.
Contact lenses made up of materials with a known Dk, may then have their oxygen transmissibility
calculated, by dividing the oxygen permeability by the thickness of each lens, providing us with Dk/t (units of x [10.
The combination produces a lens with reasonably high oxygen transmissibility
(Dk/t approximately 100), good wettability and resistant to proteins, but very flexible.
Menicon has developed two proprietary technologies (MeniSilk and Nanogloss) which combine to create 'exceptional wettability and comfort and deliver outstanding oxygen transmissibility
00D lens the Dk/t, a measure of oxygen transmissibility
, is high, at 156.
However, more often than not it is the oxygen transmissibility
at the centre of a -3.
The oxygen transmissibility
of contact lenses has increased over the past half century, with a consequential reduction in visible signs of hypoxic stress and overall improved ocular health.