The HydroCone are a custom made soft keratoconus contact lenses with an unique design. The patented dynamic stabilization retain the same oxygen supply at the limbus comparing a standard prismatic contact lens. This soft keratoconus contact lenses are available as a single vision, but also in a multifocal version. Depending on the stage of the keratoconus, the HydroCone is available for early and advance stage keratocone. The design provides the patients with comfort as a standard soft contact lens and visual acuity similar to rigid lenses.

Geometrie

Spherical back optic zone with strong aspheric flattening
Front toric optic zone
Dynamic stabilisation with bumps nasal and temporal
Optimised centre thickness

hydrocone

Variations

keratoconus of degrees 1 to 2

keratoconus of degrees 3 to 4

HydroCone P

Multifocal-torical front optic zone in Bifocal (Bf) / Simple progressive (Sp) / Multi progressive (Mp)

Technical data

Total diameter: 12.00 -> 15.00 mm
Base curve: 7.00 -> 12.00 mm
Sphere: -40.00 -> + 40.00 dpt
Cylinder: -0.25 -> -8.00 dpt
Axe: 0° -> 180°
Addition: +0.50 ->+4.00 dpt
Central optical zone Zoc: 1.00 -> 4.50 mm
Flattening: (+) K12/ (+) K34

steps 0.01 mm / 0.01 dpt / 1°

First fitting

We suggest working with trial lenses with cyl −0.01 dpt.

Keratoconus classification

First apply the topographic indications or the following rules:

Vcc > 0.6 and/or keratometry > 6.80 mm: grade 1 or 2 (HydroCone K12)
Vcc < 0.6 and/or keratometry < 6.80 mm: grade 3 or 4 (HydroCone K34)

Diameter and base curve: 1st trial lens

HydroCone K12: rO = 8.00 / ØT = 14.00 mm
HydroCone K34: rO = 7.80 / ØT = 13.70 mm

Advice

The first trial lens helps to validate rO / ØT.
Dynamic stabilisation marks are needed
to measure the stabilisation axis
The power (F’v) is spherical because part of the correction is made by the tear film and can’t be anticipated. The final cylinder corresponds to the residual astigmatism.
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.
Use upper and lower eyelids to remove the contact lens.
By halo, increase optic zone diameter
Measurement of the residual astigmatism with autorefractometer plus subjective refractometry.
Due to geometry, the contact lens can slip a little bit to the bottom.
Increasing centre thickness can improve the visual acuity.
HydroCone P fitting: initially fit with HydroCone (single vision toric lens) then add progression in a second step.

Materials: Silikon-Hydrogel Definitive 74%, Igel 77%

Recommended Lens Care Solution:

Tekniske data:

Total diameter 12.00 => 17.00 mm

Base curve 7.20 => 10.80 mm

F'v Sphere -40.00 => +40.00 dpt

Cyl -0.25 => -8.00 dpt

Axis 0° => 180°

Addition +0.50 => +4.00 dpt

Flattening K12 + K34 ++

Optimised centre thickness Default: K12 = 0.42mm, K34 = 0.52 mm

Range of thickness: 0.35 => 0.59 mm

Central optic zone 5.00 => 7.50 mm
Materials: Definitive 74 / Igel 77

Geometry

HydroCone Spherical back optic zone with strong aspheric flattening Front toric optic zone

Dynamic stabilisation with bumps nasal and temporal Optimised centre thickness

HydroCone P

Front optic zone Bifocal (Bf) / Simple progressive (Sp) / Multi progressive (Mp)

Produkter

Hydro Cone Toris K - Soft Keratoconus