Orthokeratology Contact Lenses

Latest generation materials with very high DK
Accessible / available for purchase by the public
Delivery in 72 hours
Myopia in general up to -5.00 with an astigmatism < – 1.75 (without eye diseases
Progressive myopia
People wanting refractive surgery but having a contraindication
The practice of contact or aquatic sports
People working in dusty environments
People who want clear vision without glasses or contact lenses
1 year
Nighttime wear


OrthoLens is a modern Orthokeratology lens, and thanks to its special geometry it eliminates all or most myopia by reversible modeling of the cornea. The OrthoLens is worn at night while sleeping, allowing the wearer to enjoy clear vision all day without glasses or contact lenses. The correction is 70% from the first night, complete after 3 to 4 nights and stabilizes after 4 weeks.

OrthoLens significantly improves the quality of life of patients and allows myopia control for younger patients without irreversible changes.

OrthoLens design

The posterior surface of the OrthoLens lens is made up of five zones

Central area
Reverse area
Two alignment zones
A peripheral clearance zone

Each of these areas is defined with a specific curvature and width calculated for a given cornea

The Central Zone: called the optical zone, its diameter defines the treatment zone and its radius r0 is determined according to the myopia to be reduced. Exerts a positive corneal tissue flattening force.
The Inverse zone: Characterized by a radius (RC) less than r0, creating a negative force and forming a tear reservoir.
The Alignment Zone: composed of two curvatures AC1 and AC2, this is the zone whose rays align with the paracentral cornea, this zone controls the centering and movement of the lens.
The Peripheral Zone: 0.5 to 0.8 mm wide, its radius is defined by the desired edge lift (AEL). It facilitates tear exchange and lens movement.


The success of adjustment of OrthoLens lenses depends on the consideration of three essential points

Have a mastery of the principles and rules of the practice of Orthokeratology
Selecting the right candidate for orthokeratology
A precise topography is mandatory for the practice site

Choice of trial lens

The fit of the OrthoLens does not require a trial lens; the lens is custom-made based on the corneal topography, and specially dedicated software will calculate the parameters of the OrthoLens lens to be fitted.

Send to the laboratory :

The topography :

  • Corneal radii of curvature
  • Eccentricity in both meridians
  • Corneal diameter
  • Pupillary diameter in ambient light


The refraction glasses

Evaluation of fit:

Use a drop of physiological serum without preservative (or moisturizing eye drops) before inserting the lens, then proceed to evaluate the fit:

Centering : It is essential that the lens is well centered, as the ortho-K effect will be weak, and distortions may appear if the lens is off center.
Mobility : about 1 mm after blinking; the lens should not adhere to the cornea
Fluorescent image :

  • Central zone: centered vertically and horizontally, approximately 3 to 5 mm in diameter
    • If the area is not identifiable, the lens is too tight
    • If the area is too dark, the lens is too flat
    • Center pitting also indicates fit is too flat
  • Tear reservoir: 0.5 to 1 mm wide, without air bubbles
  • Alignment zone: Aligned with the paracentral cornea 1 to 1.5 mm wide
  • Peripheral clearance: from 0.5 to 0.8 mm

Ortholens Bien Adaptée
Ortholens Plate
Ortholens Serrée


Diameter 9.00 to 12.50 mm by 0.1
Radius Function of myopia to be corrected by 0.01
Optical Zone 5.00 to 8.00 mm by 0.1
Power -2.00 to +3.00 by 0.25 D
Myopia to be corrected -0.75 to -5.00 D


Classification Focon III 5 Focon III 5
Name Roflufocon E Tisifilcon A
DK 125 180
Hardness 77 81
Light transmissibility 94% 96%
UV Filter Yes Yes
Tint Transparent Transparent


We recommend using a care solution for rigid contact lenses without preservatives Regard K®

See Product


Biolens Lab offers a 3 month guarantee of fit for OrthoLens lenses.