oxygen transmissibility

oxygen transmissibility 

The degree to which oxygen may pass through a particular material of a given thickness. It is equal to the oxygen permeability divided by the thickness of the measured sample under specific conditions. Symbol: Dk/t. Unit: Barrer/cm. See hypercapnia; oedema; oxygen permeability; corneal exhaustion syndrome.
References in periodicals archive ?
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.