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HydroMed

The HydroMed is a custom made soft post-surgery contact lenses with an unique, fully customisable design. The patented dynamic stabilization retain the same oxygen supply at the limbus comparing a standard prismatic contact lens. This soft post-surgery contact lenses are available as a single vision, but also in a multifocal version.

Depending on the topography, the HydroMed is available with one or two peripheral, fully customisable, curves . The design provides the patients with comfort as a standard soft contact lens and the optic zone can be adjusted to get a visual acuity similar to rigid lenses.

Beschrijving

Geometry

  • Spherical back optic zone with customisable spherical flattening (inverted or not)
  • Front toric optic zone
  • Dynamic stabilisation with bumps nasal and temporal
  • Available with optimized center thickness
  • Marking at 0° and 180°

Variations

HydroMed S1S: Spheric center and 1 customisable peripheral zone

HydroCone 34: Spheric center and 2 customisable peripheral zone

HydroMed P:Multifocal-variants of HydroMed with front optic zone in Bifocal (Bf) /  Simple progressive (Sp) /  Multi progressive (Mp)

Technical Data

Parameterfromtosteps
Total diameter12.00 mm17.00 mm0.01 mm
Base curve7.00 mm12.00 mm0.01 mm
Sphere-40.00 dpt+40.00 dpt0.01 dpt
Cylinder-0.25 dpt-8.00 dpt0.01 dpt
Axe0°180°1°
Addition+0.50 dpt+4.00 dpt0.01 dpt
Central optical zone Zoc1.00 mm5.50 mm0.01 mm
Flattening1 or 2 customisable peripheral zones

Extra informatie

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 working with trial lenses with cyl −0.01 dpt.

Geometry choice

First apply the cornea indication or topography:

  • Post Lasik: 2 curves (S1S), 1 inverted flattening
  • Post keratoplasty: 3 curves (S2S), 2 customisable flattening (inverted or not)
Diameter and base curve: 1st trial lens
  • ØT: corneal diameter + 2.5 mm
  • Ø0: central operated optic diameter measured by topography. Otherwise default value
  • BC: rcfl + 0.30 mm
  • Ø1 (S2S):external diameter of the operated zone
  • r1 (S1S) and r2 (S2S): standard base curve of a soft contact lens (~8.70 mm)
  • r1 (S2S): overlapping zone (Zr), if BC < r2: r1 = r2 + ~0.30 mm / if BC > r2: r1 = r2 − ~0.30 mm
Advice
  • The first trial lens helps to validate base curves and diameters. Dynamic stabilisation marks are needed to measure the stabilisation axis.
  • F’v for the trial lens order: spectacle sphere (adjust BVD = 0) with −0.01 dpt × 180° cylinder.
  • For changes and control over several months always use the initial (genesis) lens for over refraction.
  • It’s possible to use virtual fitting assistant to determine the different zones.
  • We recommend using Fluorescein with large molecules to detect and identify problems resulting from the fit.
  • Measure the residual astigmatism by auto refractometer plus subjective refractometry.
  • Due to inverted flattening, a weak mobility of the contact lens is normal.
  • It’s possible to modify centre thickness to adjust cornea irregularities (see HydroCone).
  • HydroMed P fitting: initially fit with HydroMed (single vision toric lens) then add progression in a second step.

Soft Contact Lens Materials

FeaturesDefinitive 74 (SiH)UniSil 62 (SiH)Igel 77CTF 67GM3 58Igel 58GM3 49

ES70 UV

DK Fatt ISO 9913-160*/44**50*/37**39*/29**30*/22**25*/19**21*/16**16*/12**

35*/26**

Material typeSilicone HydrogelSilicone HydrogelHydrogelHydrogelHydrogelHydrogelHydrogel

Hydrogel

ManufacturerContamacContamacContamacContamacContamacContamacContamac

Lunelle

ClassificationFilcon V3Filcon V3Filcon II3Filcon II2Filcon II1Filcon II1Filcon II1

Filcon II2

Water content74%62%77%67%58%58%49%

70%

Refractive index1.371.511.371.391.411.401.42

1.38

Handling tintclear / blueblueclearclearclear / blueclearclear / blue

clear

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

Lunelle ES70

Lunelle ES70 Material, the optimal solution for eye health and safety since the '80s.

The researchers has led in the ’80  to the development of Essilor’s ES70 contact lens material, the most stable high quality material for soft lenses.
Through intensive research, ES70 has been proven to be one of the safest and healthiest lens materials that has been developed over time. Lenses made from ES70 material can be adapted to all types of visual defects with optimum safety and for a wide range of uses

LUNELLE ensures good oxygenation of the cornea

Material permeability is an important parameter in the fitting of contact lenses. For soft lenses, this permeability depends on the water content of the material.
The ES70 material used for Lunelle lenses has a hydrophily of 70%. It has a permeability (Dk) four times higher than that of HEMA and twice as high as that of a material with 55% hydrophily.
The choice of a non-ionic material gives a good resistance to deposits on the lens and therefore an optimal supply of oxygen throughout the life of the lens.
The material ES70 is composed of non-ionic polymers. It delivers a limited amount of protein substances to the lens surface, which ensures better visual quality.

LUNELLE ENSURES GOOD VISION FOR A LONG TIME

Lunelle considers the metabolism of the cornea. The geometry of the Lunelle lens ensures good mobility, so that a film of tears between the lens and the eye is ensured. This pumping effect contributes to a higher oxygen supply, so that the metabolism remains practically unchanged.
At the same time, the high-water content remains stable and ensures an optimal metabolism.
The combination of the ES7O material and the geometry of the Lunelle lens offers a completely safe fit by respecting the corneal metabolism.
Lunelle ES70 allows contact lenses to be used all lifelong.
The material is fully compatible with the cornea with special properties in the water bond, so that a stable geometry is achieved and therefore a low sensitivity to changes in pH, temperature and tonicity.
Lunelle lenses have good mobility and remain comfortable throughout the wearing period.
 

Lunelle Lenses - for a precise fit of all visual defects

The ES70 Material

The ES70 material used for Lunelle contact lenses is composed of PMMA, which makes it robust and transparent, and PVP, which ensures a stable water content. The production of ES70 material will continuous after the take over by SwissLens. The same laboratorie will produce the row material and blank as before and exclusively availalbe for the Lunelle Products from SwissLens. The material involves the use of the most advanced techniques to obtain the stable material. The development of Essilor's polymerisation technology has proven to provide a very consistent material quality.

PRODUCTION SwissLens uses a high-tech lathing technique to achieve optimum reproducibility. Lunelle contact lenses are systematically inspected at all stages to ensure that the parameters remain the same in the dehydrated state
QUALITY GUARANTEE
The material and the contact lenses are produced in accordance with the strict rules laid down by Quality Assurance. This is an independent quality assurance service at Essilor, which ensures consistent product quality.

SPECIFICATION

  • Percentage of hydrophily 70 %
  • DK: 35
  • Transmission in the visible area (%) 98,6
Increase DK permeability according to the method FATT at 35° C
10·11.cm'(02).cm/cm2.s.mmHg

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