LED illumination digital Operation Microscope for Neurosurgery & Orthopedic & ENT Features: 1. Advanced apochromatic technology and unique optical balanced technology effectively improves the binocular visual fusions, strengthens in third dimension and reduces surgeon's tiredness during operations. 2. Fine focusing knob is under the bottom of assistant binocular. 3. The observation of the assistant's microscope can be finely focused independently of the main microscope to avoid different observation from surgeons. 4. 20°oblique illumination can also be used as slit illumination. Slit width is continuously adjustable for ophthalmic use.