The Menicon EX ® rigid gas permeable contact lens is a spherical design. The posterior curve is selected so as to properly fit eye and the anterior curve is selected to provide the necessary optical power to correct refractive error. A peripheral curve system on the posterior surface allows tear exchange between the lens and the cornea.
The lens material is a copolymer of fluoromethacrylate, siloxanylmethacrylate and methacrylic acid.
The physical/optical properties of the lens are
|Light Transmittance||>90% (380 to 780nm)||ISO18369-3|
|Water Absorption||Less than 0.5% by weight|
|Oxygen Permeability (Dk)||64×10-11 (cm2/sec)(mLO2/(mL × mmHg))||ISO18369-4|
Menicon EX ® is specifically designed to reduce the burden to the cornea and to enhance smooth tear exchange while maximizing comfort during extended wear.
Both front and back bevels are made in an aspheric configuration with a larger width.
|Front Optic Diameter and Power Range||0.00～±10.00D 7.5mm
|Constant Axial Edge Lift||90.08mm||90.09mm||90.10mm|
|Center Thickness (at-3.00D)||0.15mm|
* Products and availability may vary by country.