To meet the increased demand for specialty large diameter and scleral lens designs, TYRO was formulated with high oxygen permeability, rigidity and a hydrophilic surface.  TYRO lenses combine the best possible balance of wettability, comfort and high oxygen permeability. 

Lenses can be made in spherical, aspheric, toric and bifocal configurations. Practitioners prefer TYRO because it offers greater rigidity and lower flexibility compared to other high Dk materials. Blanks are precision machined to 12.70mm x 4.40mm. Large diameter bonnet and flat blanks are available in 17mm, 21mm and 25mm diameters.  Large diameter blanks are available in clear or a light blue visibility tint, with or without a UV absorber.

Specifications:

• Oxygen Permeability (Dk):  97
• Refractive Index:  1.440
• Wetting Angle:  <25°
• Hardness (Shore):  D/83
• Specific Gravity:  1.087
• Stock Colors:  medium and dark shades of blue, green, gray and brown; violet and clear; tyreen (blue-green); with or without a UV absorber.