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27 G needle tip on enucealated porcine eye. (a) Needle approaching cornea and (b) out of field both cross-sections due to tracking error. (c) Needle starts perforating the cornea and (d) needle visualized inside the cornea after perforation. Video scale bar: 5 mm, OCT scale bar: 0.5 mm (Visualization 4 (4.4MB, MP4) ).
