This is purely hunch, but I have to doubt that it's within the range of home printers. The layer lines on the extruder type machines are way too large for optics, I'm really quite sure. The lines on consumer level resin printers, as far as I've seen (only a couple of samples) are a whole lot better, but for optics still not nearly good enough; there'd be so much post post processing needed that it doesn't seem worth doing rather than just CNC machining the lens from scratch, at least as viewed from this armchair. Is there better printing technology yet, technology that could do the job? Well, you're learned that some companies are doing it, so yes. In range for the consumer? As I said, I really doubt it.I know that some companies are 3D printing lenses for glasses. I don't know what they do to get rid of bubbles etc. It'd be worth looking into, to see if something similar can be done at home.