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ToriFlex

ToriFlex

ToriFlex are toric RGP lenses with two different designs. One Bi-Toric and a Front-prismatic toric variation depending the cornea topography and prescription. This guaranties an easy and fast fit procedure.

Description

Geometry

ToriFlex BT

ToriFlex Bitoric
  • Bitoric
  • 1 aspherical flattening
  • ΔrCfl-rCst: Kreading difference of ≥ 4/10 mm

ToriFlex TP

ToriFlex Front toric
  • Front toric prismatic
  • 1 aspherical flattening
  • ΔrCfl-rCst: Kreading difference < 4/10 mm

Technical Data

Parameterfromtosteps
Total diameter8.00 mm10.00mm0.01 mm
Base curve6.00 mm9.00 mm0.01 mm
Sphere-30.00 dpt+20.00 dpt0.01 dpt
Cylinder BT ΔrOfl-rOst0.00 dpt-8.00 dpt-0.25 dpt
Cylinder TP-0.25 dpt-8.00 dpt-0.25 ddpt
Axe0°180°1°
FlatteningStandard (std)flat (+)step (-)
Prism1.50 (Std)2.00

Additional information

Application

Indication

Correction type

, ,

Lens Type

Designed by

SwissLens

Fitting advices for ToriFlex

Spectacle power must be converted into contact lens power (VD =0)

Total diameter: standard 9.50 mm

Bitoric Geometry (BT):

  • If astigmatism with the rule (WTR) flat K @ 0° ± 30°
    • r0fl = rcfl – 0.05 / r0st = rcst + 0.05
    • F’afl = Sph − 0.25 dpt
    • F’ast = Sph + (-Cyl) + 0.25 dpt
  • If astigmatism against the rule (ATR) flat K @ 90° ± 30°
    • r0fl = rcfl + 0.05 / r0st = rcst – 0.05
    • F’afl = Sph+ 0.25 dpt
    • F’ast = Sph + (-Cyl) – 0.25 dpt
  • If astigmatism oblique flat K @ 135° ± 15°/ 45° ± 15°
    • r0fl = rcfl / r0st = rcst
    • F’afl = Sph
    • F’ast = Sph + (-Cyl)
  • Fronttoric prismatic (TP):
    • r0 = rcfl – 0.05
    • F’v: SphCL = Sph − 0.25 dpt / CylCL = (-Cyl) + ((rcfl-rcst)*5) / A°CL = A° glasses

Fitting advices for gas permeable contact lenses

Geometry

  • Insert trial lens for a minimum duration of 30 minutes. Ask patient to focus on the floor to minimise the foreign body sensation.
  • Evaluation of the subjective comfort.
  • Over-refraction
  • Slit lamp examination:
  • Dynamic evaluation with diffuse illumination:
    • Eye in primary gaze and blinking normally.
    • Movement (speed) and position after blink and during eye movements:
      • Vertical movement
      • Horizontal movement
      • Centration
      • A good fitting lens will be evenly centered on the cornea (±0.5 mm)
      • The movement should be pronounced but not too big (1-2 mm)
  • Static evaluation with fluoroscopy:
    • Evaluation when patient is looking straight ahead and the lens is centered on the cornea without impact of the eyelids on the lens: Evaluation of the tear film thickness under the lens; tear film < 10μm = no florescein is visible.
      • central optic zone with alinement fluorescein pattern
      • inter-peripheral zone with small amount of fluorescein
      • peripheral zone with a band of increased fluorescein which will be needed for a good tear film exchange
fit_rgp-zones
Advice for Toriflex

The optimal fluorescein pattern shows a small fluor lake in the center and a larger fluor ring in the periphery (env. 0.75 mm).
Vertical movement should be around 1 mm. In case of too much movement, decrease both central back curves (r0fl and r0st) with -0.10 mm. In case of low riders increase both central back curves (r0fl and r0st) with +0.10 mm or in case the upper lid is pushing the lens down, increase the total diameter ØT.

In case of high riders, decrease total diameter ØT

For Toriflex TP only:

In case of instable stabilisation and/or high riders, increase the prism to 2.0 cm/m.

WARNING: the stabilisation prism induce an optical prism. This should be adjusted on both eyes.

too steep

ToriFlex too steep

optimal fit

ToriFlex optimal fit

too flat

ToriFlex too flat

Product Video

Rigid Contact Lens Materials

Features

Boston XO

Optimum Comfort

Boston EO

Optimum Classic

Boston ES

Contaperm F2 low

DK Fatt ISO 9913-1

100*/75**

65*/49**

58*/44**

26*/19.5**

18*/15**

11*/8**

ManufacturerPolymertechnologyContamacPolymertechnologyContamacPolymertechnology

Contamac

Wettability angle49° (2)6° (3)49° (2)12° (3)52° (2)

19° (3)

Hardness (4)79.979838385.4

83

Refractive index1.4151.4371.4291.451.443

1.46

Handling tintblue red green lilablue greenblueblue greenblue green

clear

UV√√√√√

√

Durability+++++++++++++

+++

Resistance deformation (5)++++++++++++

++

Long term wearing+++++++++

+

Tear film with lipid++++++++++

++

Tear film with protein++++++++++

++

Wettability++++++++++++

++

* ×10-11 (cm2/sec) [ml 02/(ml × mm Hg)]

** ×10-11 (cm2/sec) [ml 02/(ml × hPa)]

2 Wettability angle = CLMA method 

3 Receding contact angle (DCA)

4 Shore D 

5 Corneal astigmatism

More information about the product features (Article by Boston Materials)

Default material: Optimum Classic Blue

Quality assurance

These materials are in conformity with the standard ISO 10993-1 defining the biocompatibility of materials.

SwissLens manufacturing process warrants this biocompatibility even after the manufacturing process, in particular without adding polish material. This standard is required by the quality assurance system of SwissLens.

Boston Materials

Materials

Material Training with Martin Conway from Contamac

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