Algerbrush - Pterygium Instruments with 2.5mm BurrFollowing surgical removal of the Pterygium, smoothing of the surface of the cornea can now be accomplished with this diamond abrasive tool. Burrs are offered in both medium and fine, however the medium is the most popular. Available as a complete kit or the one piece Pterygium attachments. These can replace the chuck and burr on the Algerbrush II. Older Algerbrush I (silver) units will not work with the Pterygium attachments. See Option list for a