Quality clear corneal buttons made according to your specifications, with the pupil as low as possible or without pupil. Pupil sizes (mm): 2, 2.5, 3, 3.5, 4, 4.5 Now 2 front curves. The original steep front radius of 8mm and a new flatter front radius of 9mm for a shallower chamber. The shallow button will give a more accurate observation of the final iris result during painting or after gluing. For your thinnest, most-difficult-to-make ultra-thin prostheses, use the 13 mm back radius with the new 9mm front radius. Flat buttons. Choose either back cut only (sharp edge) or with an edge cut of 0.5mm (thicker button). Button sizes (mm): 11, 11.5, 11.75, 12, 12.5, 13 Curved buttons. Choose button size (12, 12.5 and 13mm) and radius of back curve (13, 16 and 22mm). Available in back cut only (no edge cut). Coloured Buttons. Choose flat or curved and color (medium or dark blue-grey, medium or dark brown, and black). Drilled Colored Buttons. Also available with small 2mm hole drilled from behind.