The FlexMed spherical RGP lens for irregular cases, especially after surgery, is a custom back surface Multicurve design. This promise an optimal fit and increase the customer comfort.




  • Multicurve Reverce Design
  • Spherical center
  • 2 custom flattening

Other variants:

  • FlexMed 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 mm12.00 mm0.01 mm
Sphere-40.00 dpt+40.00 dpt0.01 dpt

Další informace




, ,

Correction type

, ,

Lens Type

Designed by


Fitting advices for FlexMed

We suggest to use our trial set

  • Total diameter: Ø Cornea − 2.0 mm (Standard 9.80 mm)
  • Base curve: „r0 (Topographie) = rcfl
  • Sphere: eyeglasses sphere (Vertex power = 0)


If the adaptation is not satisfactory, try Orbiflex SxS for fine tuning
Order the definitive contact lens on line using the form “Back surface design”

Fitting advices for gas permeable contact lenses


  • 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 an aligned 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

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

Materiály tvrdých kontaktních čoček


Optimum Infinite

Boston XO

Optimum Comfort

Boston EO

Optimum Classic

Boston ES

Contaperm F2 low

DK Fatt ISO 9913-1

180*/ 135**











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

19° (2)

Hardness (4)




Refractive index




Handling tint

blue red green clear

blue red green lilablue greenblueblue greenblue green

blue green clear






Resistance deformation (5)




Long term wearing




Tear film with lipid




Tear film with protein












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

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

2 Úhel smáčivosti = metoda CLMA

3 Receding contact angle (DCA)

4 Shore D

5 Rohovkový astigmatismus

Další informace o vlastnostech výrobku (článek od Boston Materials)

Výchozí materiál: Optimum Classic Blue

Kontrola kvality

Tyto materiály jsou v souladu s normou ISO 10993-1 definující biokompatibilitu materiálů.

Výrobní proces SwissLens zaručuje tuto biokompatibilitu i po skončení výrobního procesu, zejména bez přidání lešticího materiálu. Tento standard je vyžadován systémem zajištění kvality společnosti SwissLens.

Boston Materials


Materiálové školení s Martinem Conwayem ze společnosti Contamac

Annual team meeting

We are currently in annual team meeting.

Our phonecall line is currently closed, We apologize and try to do our best to come back as soon as possible. 

Customer service email : lens.order@swisslens.ch