Defocus (bifocal) lenses are special soft contact lenses designed to control and slow the progression of myopia in children and adolescents by creating myopic peripheral defocus, which inhibits the growth of the eyeball.
Advantages
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Slowing the progression of myopiaIn children and adolescents (lenses simultaneously provide high visual acuity and cause peripheral relative myopic defocusing). -
Unique lensesThe soft bifocal lenses OKVision® Prima BIO Bi-focal and OKVision® Defocus Control Lens have no analogues in Georgia. It was developed by our company and has been used to slow the progression of childhood myopia since 2018. The lenses are also available in a daily replacement format. -
Protective edge of the lensIt does not disrupt the tear exchange in the subcrustal space, does not sink into the conjunctiva, as it is located parallel to it. -
Safe and comfortable wearingReducing the possible risks of complications and eliminating additional care products, as well as the possibility of longer wearing (up to 14 hours) compared to lenses with monthly replacement.
Types of lenses
- Monthly replacementHydrogel bifocal soft contact lenses for monthly replacement to control the progression of myopia in children and adolescents.
- Daily replacement lensesHydrogel bifocal soft contact lenses for daily disposability to control the progression of myopia in children and adolescents.
- Defocus Control LensToric bifocal contact lens with distance center and variable addition. To control myopia.
- Defocus Control LensSpherical bifocal contact lens with distance center and variable addition. To control myopia.
Lens Characteristics
- Material: Hioxifilcon A
- Manufacturing method: Cast mold
- Water content: 55%
- Oxygen permeability (Dk/t): 34.5×10 -9
- Elastic modulus: 0.5 mPa
- Curvature: 8.4 mm
- Diameter: 14.2 mm
- Refraction range (Pwr, D): from -0.50 to -5.00 step 0.25; -5.50; -6.00 add 4.00
- Addition value: 4.0 D
- UV protection: yes
- Additional humidification system: 3D
- Aspherical design
- Rounded edge
- Wearing mode: daytime.
- Replacement mode: 1 month.
- Packing: 6 blisters.
Lens Characteristics
- Material: Hioxifilcon A
- Manufacturing method: Cast mold
- Water content: 55%
- Oxygen permeability (Dk/t): 33.00×10 -9
- Elastic modulus: 0.18-0.25 MPa
- Curvature: 8.4 mm
- Diameter: 14.2 mm
- Refraction range (Pwr, D): from -0.50 to -5.00 step 0.25; -5.50; -6.00 add 4.00
- Addition value: 4.0 D
- UV protection: yes
- Additional humidification system: 3D
- Aspherical design
- Rounded edge
- Wearing mode: daytime.
- Replacement mode: 1 day.
- Packing: 30 blisters.
Lens characteristics
Possible materials:
- Hydrogel Contamac GMAdvance 49%
- Hydrogel Contamac GMAdvance 58%
- Silicone hydrogel Contamac Definitive 74%
- Addition zone: from 3.0 D to 6.0 D (step 0.25 D)
- Optical power: -30.0 D to +30.0 D (0.25 D steps)
- Cylinder: -0.25 D to -10.0 (0.25 D steps)
- Axis: 10° to 180° (1° increments)
- Base Curvature: 7.0mm to 9.0mm
- Diameter: 13.0 mm to 15.0 mm
- Manufacturing method: turning
- Wearing mode: daytime
- Replacement period: 6 months
Lens characteristics
Possible materials:
- Hydrogel Contamac GMAdvance 49%
- Hydrogel Contamac GMAdvance 58%
- Silicone hydrogel Contamac Definitive 74%
- Addition zone: from 3.0 D to 6.0 D (step 0.25 D)
- Optical power: -30.0 D to +30.0 D (0.25 D steps)
- Base curvature: 7.0 to 9.0 mm (1 mm increments)
- Diameter: 13.0 to 15.0 mm (1 mm increments)
- Possibility to change the size of the central optical zone
- Manufacturing method: turning
- Wearing mode: daytime
- Replacement period: 6 months
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