One of the substantial challenges was to ensure that both the sigmoidoscope and proctoscopes in the LUX range always deliver 100% of the light available from the light guide to the examination site. For both sigmoidoscope and proctoscopes there is always the risk that the distal end of the light guide may become occluded by faecal matter. All the EVEXAR scopes employ our patented ‘CLEAR VIEW’ system which ensures that no occlusion of the light guide occurs. The system consists of a flexible shutter, attached to the obturator which while the product is being inserted closes the gap between the scope barrel and the obturator body. Once the scope is inserted and as the obturator is removed, the patented shutter automatically lifts over the light guide ensuring a clear view of the examination site.