Devices in accordance with certain embodiments of the present sulcus speculum are designed to be placed into the sulcus of an eye to perform one or more of the following functions: evacuation of fluid, opening of the lids, and application of drugs such as anesthetic or antibiotics. The present devices...http://www.google.co.uk/patents/US7175594?utm_source=gb-gplus-sharePatent US7175594 - Ophthalmic sulcus speculum
