Borelis

The Borelis is an individual soft multifocal contact lens for all spherical refractive errors in presbyopic patients. Its wide range of parameters and materials allows an optimal adaptation to the eye and therefore highest wearing comfort and long wearing times.

Description

Geometry

  • Spherical front and back optic zones
  • Aspheric flattening
  • Front spherical multicurve optic zone
  • Distance or Near in center

Multifocal Variations

Bifocal (Bf): two spherical concentric optic zones distant / near

Simple Progressive (Sp): spherical and aspheric concentric zones: distance / intermediate / near

Multi progressive (Mp): multiple spherical concentric zones: distant / near

Materials

All Soft Lens Materials 

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

Multi progressive (Mp)

  • multiple spherical concentric zones: distant / near
  • CN

Fitting advice

  • Total diameter: = corneal diameter + 2.30 mm
  • Base curve: = flattest corneal curve + 0.70 mm
  • Sphere: glasses in DVO = 0 mm
  • Flattening: comparing the sulcus

Technical Data

Parameterfromtosteps
Total diameter12.00 mm15.00... 19.00 mm0.01 mm
Base curve7.00 mm12.00 mm0.01 mm
Sphere-40.00 dpt+40.00 dpt0.01 dpt
Addition+0.50 dpt+4.00 dpt0.01 dpt
Central optical zone Zoc1.00 mm5.50 mm0.01 mm
Flattening(-) flowing(+) pronounced (-–) monocurve

Additional information

Application

Indication

Correction type

,

Lens Type

Designed by

SwissLens

Fitting advice and guide for soft contact lenses

Diameter and Base curve choice for the first contact lens

  1. Measurement of the corneal diameter (HVID + 0.6 mm)* and K-readings
  2. Determine the contact lens diameter ØT (use table below)
  3. Determine the Base curve r0 = rcfl + BCf (use table below, rcfl = flattest central K)

Orbis (ØCornea + 2.10 mm / BCf = 0.60 mm)

Toris Bal – Torelis Bal – Borelis (ØCornea + 2.30 mm / BCf = 0.70 mm)

Toris Int/Ext – Torelis Int/Ext (ØCornea + 2.50 mm / BCf = 0.80 mm)

Example: Parameter for Toris Ballast:

Cornea parameters: ØCornea = 11.70 mm / Kreading = 7.80 / 7.70 mm

  • ØT = 11.70 mm + 2.30 mm = 14.00 mm
  • r0 = 7.80 mm + 0.70 mm = 8.50 mm

for 0.40 mm delta K, reduce 0.10 mm on r0

Definitive 74: 0.10 mm steeper

* Information: 80% of the corneal curves are statistically between 11,3 and 12,1 mm.

Progress of the adaptation

  1. Insert trial lens for a duration of between 30 minutes and 2 hours. Over refraction (you can use the autorefractometer for getting an idea of cyl/axis).
  2. Biomicroscopy (× 10 to 15) white light: observe the lens with patient looking straight ahead and during eye movement.
  3. Mobility by eyelid movement (Push up test).
  4. Sag of the lens should be from 1 to 2 mm downwards.
  5. Appearance of the front optic zone: tear film, hydration, lubrication, deposit.
  6. Keratometry on the contact lens: (deformation of the mires).
  7. Check for corneal and conjunctival staining with fluorescein after lens removal.
  8. Order the definitive lens on the basis of the SN.

First contact lens choice

Progression system and central optic zone (Zoc)

Reading zone choice
  1. Centre near vision in most cases
  2. Peripheral near vision if distance vision is poor, high myopia or decentrated pupil.

Procedure

  • Determine dominant eye
  • Find maximum convex (+) correction for distance vision
  • Find the best acuity in distance vision to optimise Zoc diameter choice
  • Determine the patients needs for: distance / intermediate / near Multifocal design choice

Multifocal design choice

RequirementsBifocal BfSimple progressive SpMulti progressive Mp
Hyperopia
Myopia Addition < 1.75 dpt
Myopia: Addition ≥ 1.75 dpt
Priority in distance vision
Priority in near vision
Priority in intermediate vision (computer)
Use in low light in distance vision
Use in low light in near vision
Good contrast
Low Helos
Anisometropia > 2.00 dpt
Amblyopia ( √ )
Modified monovision care ( √ )

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 SpMulti progressive Mp
PositionCentre near (CN)Centre Distance (CD)Centre near (CN)Centre Distance (CD)Centre near (CN)
Dominant eye2.253.752.504.001.50
Non-dominant eye2.753.253.003.501.75
Undefined2.503.502.753.751.50

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

Soft Contact Lens Materials

FeaturesDefinitive 74 (SiH)UniSil 62 (SiH)Igel 77CTF 67GM3 58Igel 58GM3 49
DK Fatt ISO 9913-160*/44**50*/37**39*/29**30*/22**25*/19**21*/16**16*/12**
Material typeSilicone HydrogelSilicone HydrogelHydrogelHydrogelHydrogelHydrogelHydrogel
ManufacturerContamacContamacContamacContamacContamacContamacContamac
ClassificationFilcon V3Filcon V3Filcon II3Filcon II2Filcon II1Filcon II1Filcon II1
Water content74%62%77%67%58%58%49%
Refractive index1.371.511.371.391.411.401.42
Handling tintclear / blueblueclearclearclear / blueclearclear / blue
UV√ (blau)
Normal tear film++++++++++++++++++
Reduced tear film++++++++++++++
Watery tear film++++++++++++++++++
Tear film with lipid+++++++++++++
Tear film with protein+++++++++++++
Durability++++++++++++++
Initial comfort++++++++++++++++
Low dehydration++++++++++++++++
Moistening+++++++++++++++++
Dry eye+++++++++++++++++
Non-ionic

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

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

Default material: GM3 58% white

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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