Thank you for posting this. I also wear glasses and have been hit by a flying needle but fortunately the glasses did stop it from hitting my eye area. I am constantly changing from a ziz-zag to the single hole throat plate and have taught myself to automatically lower the needle with the handwheel to be sure the needle is in the correct position and will not hit the plate and break. I usually take about three stitches this way which will check needle position, throat plate and zz setting.