A apparatus adapted for use in clinically invasive proceedures comprising a plurality of objects forming a system, the object of which being to display to a surgeon or clinician the image of tissues and to improve the visualisation of tissue, and comprising: at least two computers or computer like devices containing microprocessors running independent operating systems wherein, Component A, is any commercially available Tablet PC or smart phone or computer device capable of displaying high-definition video images having a touch screen capable of the pinch manouver and is linked by BLUETOOTH® or equivalent to a second computer like device, Component B which has a separate microprocessor and operating system and is linked using cables to a small sterile disposable component Component C which can attach to existing surgical retractors and comprises a LED (light emitting diode) or equivalent and a CMOS pixel sensor chip or equivalent.
