Name: FlexCone | SwissLens
SKU: FlexCone
Availability: InStock

Beschrijving

Geometry

FlexCone ASP

Aspheric Design
Spherical center
1 aspheric flattening
Eccentricity: 0.10 -> 0.90
Early Keratocone

FlexCone SMS

Multicurve Design
Spherical center
3 spherical flattenings adjustable comparing to cornea eccentricity
Eccentricity: 0.10 -> 0.90
Advanced Keratocone

Other variants:

FlexCone K12: Spherical and fixed multicurve flattening for early stages
FlexCone K34: Spherical and fixed multicurve flattening for advanced stages
FlexMCone P: Multifocal versions

Multifocal Variations

Bifocal (Bf)

2 concentric Optical zones far/near
CD or CN

Simple progressive (Sp)

3 concentric Optical zones far/ intermediate / near
CD or CN

Technical Data

Parameter	from	to	steps
Total diameter	10.00 mm	12.00 mm	0.01 mm
Base curve	6.00 mm	9.00 mm	0.01 mm
Sphere	-40.00 dpt	+40.00 dpt	0.01 dpt
Eccentricity	0.10	0.90	0.01

Extra informatie

Application	Distance vision, Presbyopia
Indication	Irregular cornea, Keratoconus
Correction type	Astigmatism, Hyperopia, Myopia
Lens Type	Rigid
Designed by	SwissLens

Fitting advice

Total diameter: = corneal diameter – 2.00 mm
Base curve:
- ASP: r0 = Kflat (rcfl)
- SMS:
  - ( rcfl – rcst) ≤ 0.30 mm -> BC = rcfl – 0.05
  - (rcfl – rcst) ≤ 0.40 mm -> rO = rcfl – 0.10
  - (rcfl – rcst) ≤ 0.50 mm -> rO = rcfl – 0.15
Flattening: ASP & SMS: eccentricity (En) = eccentricity of the cornea at 30° rounded up to the next 1/10

Fitting guide

	flatten BC	steepen BC	flatten Periphery	steepen Periphery	Increase Diameter	decrease Diameter
Lens riding low	√		√		√
Lens riding high		√		√		√
Aptical Staining		√
3 & 9 Staining						√
Sup. limbal Staining						√
Fluo edge too wide				√
Fluo edge too narrow			√
Ghosting or cloudy					√
Poor Acuity	√
Bubbling / dimple veiling	√		√			√
Pooling at cone base	√		√			√
Comfort					√
Early Cone					√
Advanced Cone						√

Fluoreszein pattern

optimal fit

flat central fit

decrease BC -0.10 mm

steep central fit

increase BC +0.10 mm

peripheral flat fitting

decrease EN -0.1

peripheral steep fitting

increase EN +0.1

First contact lens choice

Progression system and central optic zone (Zoc)

Reading zone choice

Determine if the vision is alternate (change of optic zones by translation) or simultaneous (change of optic zones by visual cortex selection):

Alternate vision: reading zone in periphery (most of the cases)
Simultaneous vision: reading zone in centre

Requirements	Bifocal Bf	Simple progressive Sp
Myopia Addition < 1.75 dpt	√
Myopia: Addition ≥ 1.75 dpt		√
Priority in distance vision	√
Priority in near vision	dominant eye	non dominant eye
Good contrast	√

Distance vision depends on centering, near vision on the movement (translation).
For a good translation, a movement from 1 to 2 mm is needed. It is affected by rO and ØT.
The fluoroscopy must show good optic zone alignment.

Central optic zone, position and diameter:

Recommendations for the 1^st choice: standard pupil (3.50–4.00 mm) with normal lighting

	Bifocal Bf	Bifocal Bf	Simple progressive Sp	Simple progressive Sp
Position	Centre near (CN)	Centre Distance (CD)	Centre near (CN)	Centre Distance (CD)
Dominant eye	2.25	3.75	2.50	4.00
Non-dominant eye	2.75	3.25	3.00	3.50
Undefined	2.50	3.50	2.75	3.75

For non standard pupil size or for distance/near preference, fit the Zoc in steps of 0.25 mm

Rigid Contact Lens Materials

Features	Optimum Infinite	Boston XO	Optimum Comfort	Boston EO	Optimum Classic	Boston ES	Contaperm F2 low
DK Fatt ISO 9913-1	180/ 135*	100/75*	65/49*	58/44*	26/19.5*	18/15*	11/8*
Manufacturer	Contamac	Polymertechnology	Contamac	Polymertechnology	Contamac	Polymertechnology	Contamac
Wettability angle		49° (2)	6° (3)	49° (2)	12° (3)	52° (2)	19° (2)
Hardness (4)	81	79.9	79	83	83	85.4	83
Refractive index	1.44	1.415	1.437	1.429	1.45	1.443	1.46
Handling tint	blue red green clear	blue red green lila	blue green	blue	blue green	blue green	blue 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.

Materials

Material Training with Martin Conway from Contamac

FlexCone

The FlexCone spherical RGP lens for Keratoconus cases are available in 2 different back surface geometries as Aspherical and Multicurve. This promise an optimal fit and increase the customer comfort.