nostr:npub1y4hhv5ttdsvzl7t0pr0rys7avx5zjv5pyjfgnldrthm2c3q6fnsq3ft26u 

Ohhh it's an anti-*glare* filter.

My first PC had one of those, complete with grounding clip.

Anyone else used to believe it was against the CRT's radioactivity?