Less-Invasive access Instrument for spinal less-invasive surgery: microsurgery of discal hernia. - The optic fiber lights up the spinal canal in situ - Autostatic, re-usable - Delivered with 2 weights (500g and 1000g) to adjust retraction to patient and minimize tissue compression. - Delivered with adaptors (Storz, Wolf, ACMI) - Allows a very short skin incision (1 to 1.5) - Autoclavable - Device is compatible with most light sources (Storz, Wolf, ACMI) - Does not require any microscope nor specific instruments