FlexMed

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.

Description

Geometry

FlexMed

FlexMed-300x152
  • 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

Parameterfromtosteps
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

Additional information

Application

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Indication

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Correction Type

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Lens Type

Designed by

SwissLens

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)

Advice:

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

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 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
Undefined2.503.502.753.75

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

Rigid Contact Lens Materials

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

200.4*/180**

100*/75**

65*/49**

58*/44**

28*/21**

26*/19.5**

18*/15**

ManufacturerContamacPolymertechnologyContamacPolymertechnologyContamacContamacPolymertechnology
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
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)]

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.

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