A new tonometer prism stand

C. J. McLean
Department of Ophthalmology, North Middlesex Hospital, London, England.

A tonometer prism holder is presented herein that can be quickly constructed from a readily available eyedrops bottle. The advantage of the stand is that only the tip of the tonometer prism is immersed in disinfectant, preventing damage to the proximal end of the prism. Consistent sterilization is ensured by renewing the disinfectant around the tonometer tip from an adjoining reservoir after each use. The stand is also leakproof, and if it is accidentally knocked over, disinfectant will not spill out.