PMMA (polymethyl methacrylate)

The Lagado PMMA (polymethyl methacrylate) contact lens blanks are made from ultra-pure methyl methacrylate monomer. The polymer is highly crosslinked for stability, solvent resistance and ease of machining. Half-inch precision ground blanks are available in a number of tints. PMMA blanks are available in 12.7mm and 17.0mm diameters. The 17.0mm blank is machined with a 1/2" shoulder for blocking.


Purity (polymethyl methacrylate) > 99.5%
Hardness (Shore D) D/90
Refractive Index (nD, 25°C) 1.495
Specific Gravity (g/cc) 1.19
Wetting Angle (sessile drop) 25°
Oxygen Permeability (Dk x 10-11, 35°C) < 0.02