| 摘要 |
<p>A surgical device comprising a surgical instrument 9 and a means for measuring the distance of the implement from a surface 6. The means for measuring the distance from the surface comprises feedback means for providing a surgeon with information on the position of the surgical instrument. The feedback means can provide an audible, visual or tactile signal. The means for measuring can provided with a means for measuring optical change, for example hue and in particular an increase in redness during ultrasonic phaco-emulsification to treat cataracts.</p> |
