Ophthalmic micro-operating chair.

The proper performance of micro-manipulative techniques depends upon three main factors: a good viexv of the procedure; properly designed tools wvhich can be held in the hand yet have accurate and efficient working ends; a relaxed position so that the operator avoids spending energy fighting against gravity. Mluch thought and experience is being displayed in the introduction of microscopes and instruments for opthalmic micro-surgery (and the acquisition of the complete outfit is very costly, so that equipment must be accumulated gradually). The surgeon's seat is out of sight and mind, unless it is uncomfortable or unsuitable, but is an essential part of the equipment, in that it 'K _ y enables relaxed control of all stages of the operation. The present stool, which has been designed to fit in wvith the standard British operating table used for general and specialist surgery, enables the operator to work with the operating microscope. The simple hydraulic valve regulates the height under the weight of the surgeon to cover a wide combination of tables or