ToriFlex

Description

Geometry

ToriFlex BT

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

ToriFlex TP

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

Technical Data

Parameter	from	to	steps
Total diameter	8.00 mm	10.00mm	0.01 mm
Base curve	6.00 mm	9.00 mm	0.01 mm
Sphere	-30.00 dpt	+20.00 dpt	0.01 dpt
Cylinder BT ΔrOfl-rOst	0.00 dpt	-8.00 dpt	-0.25 dpt
Cylinder TP	-0.25 dpt	-8.00 dpt	-0.25 ddpt
Axe	0°	180°	1°
Flattening	Standard (std)	flat (+)	step (-)
Prism	1.50 (Std)	2.00

Additional information

Application	Distance vision
Indication	Regular cornea
Correction type	Myopia, Hyperopia, Astigmatism
Lens Type	Rigid
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

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

optimal fit

too flat

Product Video

Rigid Contact Lens Materials

Features	Optimum Infinite	Boston XO	Optimum Comfort	Boston EO	Contaperm F2	Optimum Classic	Boston ES
DK Fatt ISO 9913-1	200.4/180*	100/75*	65/49*	58/44*	28/21*	26/19.5*	18/15*
Manufacturer	Contamac	Polymertechnology	Contamac	Polymertechnology	Contamac	Contamac	Polymertechnology
Wettability angle	8° (3)	49° (2)	6° (3)	49° (2)	19° (3)	12° (3)	52° (2)
Hardness (4)	80.7	79.9	79	83	83	83	85.4
Refractive index	1.438	1.415	1.437	1.429	1.46	1.45	1.443
Handling tint	clear blue green	blue red green lila	blue green	blue	clear	blue green	blue green
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.

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 TP

Technical Data

Additional information

Fitting advices for ToriFlex

Fitting advices for gas permeable contact lenses

Geometry

Advice for Toriflex

For Toriflex TP only:

too steep

optimal fit

too flat

Product Video

Rigid Contact Lens Materials

Quality assurance

SwissLens

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