trans | Shaving "blind"

Hi, I've put the 'blind' in inverted comma's because my sight problems are corrected with glasses, but as soon as I take my glasses off to shave (I'm ftm and just starting to need to shave- YAY), I can't see what I'm doing! Does anyone have any hints for shaving when you can't see much further than your nose? (I can't read the letters on a chart in eye tests because I can't find the chart, I'm VERY short-sighted). Help?
Simon