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.



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)

Bifocal Bf
  • 2 concentric Optical zones far/near
  • CD or CN

Simple progressive (Sp)

Simple progressive Sp
  • 3 concentric Optical zones far/ intermediate / near
  • CD or CN

Technical Data

Total diameter10.00 mm12.00 mm0.01 mm
Base curve6.00 mm9.00 mm0.01 mm
Sphere-40.00 dpt+40.00 dpt0.01 dpt






Correction type

, ,

Lens Type

Designed by


Советы по подбору

  • Общий диаметр: диаметр роговицы — 2,00 мм
  • Базовая кривизна:
    • ASP: r0 и Kflat (rcfl) ( r0 — базовая кризизна, Kflat (rcfl) — плоский меридиан)
    • Sms:
      • (rcfl — rcst) ≤ 0,30 мм — > ВС = rcfl — 0,05 (rcst — крутой меридиан)
      • (rcfl — rcst) ≤ 0,40 мм — > rO = rcfl — 0,10
      • (rcfl — rcst) ≤ 0,50 мм — > rO = rcfl — 0,15
  • Уплощение: ASP и SMS: эксцентриситет (En) — эксцентриситет роговицы на 30 градусов, округленный до следующего 1/10

Рекомендации по подбору

flatten BCsteepen BCflatten Peripherysteepen PeripheryIncrease Diameterdecrease 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
Early Cone
Advanced Cone

Флюоресцеиновый патерн

оптимальная посадка

центральная плоская посадка

уменьшить BC -0.10 мм

крутая центральная посадка

увеличить BC +0.10 мм

плоская посадка на периферии

уменьшить эксцентриситет -0.1

крутая посадка на периферии

увеличить эксцентриситет +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
RequirementsBifocal BfSimple progressive Sp
Myopia Addition < 1.75 dpt
Myopia: Addition ≥ 1.75 dpt
Priority in distance vision
Priority in near visiondominant eyenon 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 1st choice: standard pupil (3.50–4.00 mm) with normal lighting

Bifocal BfBifocal BfSimple progressive SpSimple progressive Sp
PositionCentre near (CN)Centre Distance (CD)Centre near (CN)Centre Distance (CD)
Dominant eye2.253.752.504.00
Non-dominant eye2.753.253.003.50

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

Материалы для жестких контактных линз

FeaturesOptimum InfiniteBoston XOOptimum ComfortBoston EOContaperm F2Optimum ClassicBoston ES
DK Fatt ISO 9913-1








Wettability angle8° (3)49° (2)6° (3)49° (2)19° (3)12° (3)52° (2)
Hardness (4)80.779.97983838385.4
Refractive index1.4381.4151.4371.4291.461.451.443
Handling tintclear blue greenblue red green lilablue greenblueclearblue greenblue green
Resistance deformation (5)+++++++++++++++++
Long term wearing+++++++++++++
Tear film with lipid+++++++++++++
Tear film with protein++++++++++++++

* ×10-11 (см2/сек) [ml 02/(ml × mm Hg)]

** ×10-11 (см2/сек) [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)

Материал по умолчанию: Optimum Classic Blue

Гарантия качества

Эти материалы соответствуют стандарту ISO 10993-1 по определению биосовместимости материалов.

Производственный процесс SwissLens гарантирует эту биосовместимость даже после изготовления, в частности без добавления полирующего материала. Этот стандарт требуется системой обеспечения качества SwissLens.