David Thomas contact lenses Ltd

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ASSURE-Rx is a new generation soft back surface toric lens that provides superb on eye performance, reproducibility and a very high success rate. A new computer software controls the CNC lathe that lenticulates the front surface, reducing thickness to provide improved lens stability, and excellent visual acuity. All this wrapped in a newly developed GMMA based material providing exceptional comfort for the wearer.

Applications

For correction of corneal and residual astigmatism.

Lens Materials - Filcon 4a, 58% water content
New generation of GMMA + VP soft lens material that is Non-Ionic, gives exceptional comfort, and is resistant to deposits. The glycerol methacylate content of this material provides increased moisture retention during wear. It has a blue visibility tint for ease handling.

Physical Properties

Water Content

58% in saline at 20°C

Oxygen Permeability:

22 x 10^-11 at 30°C

(DK/L units - Fatt scale)

Lens Parameters

Diameter:

14.5*mm and 13.5mm

Posterior Curve:

Toric with blended peripheral curves

Front Curve:

Lenticulated with prism ballast

BC Range:

8.10 to 9.3 (in 0.3mm steps)

* Stock range - 8.4, 8.7, 9.0

Optical Zone Diameter:

8.00mm at -3.00DS

(varies with power)

Central Thickness:

0.19mm at -3.00DS

(varies with power and cylinder)

Lens Powers:

SPH: -10.00 to +10.00DS

CYL: -0.25 to -10.00DS

Axis:

1° to 180° in 1° steps

Powers outside range are available upon request.
(*) Stock Range
Dynamic 060505 available.

Fitting Procedure
ASSURE Rx lens can be empirically fitted (see detailed fitting instructions)

Cleaning Procedure
Hydrogen Peroxide or a chemical disinfecting system (MPS) is recommended for cleaning the lens.

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