Wait, the user specified the chart must be a segment-stacked with real segments. Let me confirm the actual segments. Ophthalmic surgical microscopes can be segmented by type (clamp-on, free-standing), application (cataract surgery, retinal surgery, others), end-user (hospitals, ambulatory centers), or technology (LED, halogen, laser). Since the market is clamp-on specifically, maybe the base market includes free-standing as well. But the user wants the chart for Clamp-On specifically. Hmm, maybe the segments are by application: Cataract, Retinal, Others. Or by technology. Let me check the real market segments. For example, some reports segment by product type (clamp-on vs free-standing), others by application. Since the user is focusing on clamp-on, maybe the segments are by application. But the user's base data isn't provided. Let me proceed with technology as the segment, as it's a common segmentation.