4 ms·
Most (all?) of the cheap online retailers allow to (some require to!) enter a PD value and also provide instructions on how to measure it. I personally use http
by qbantek 5y ago
Most (all?) of the cheap online retailers allow to (some require to!) enter a PD value and also provide instructions on how to measure it. I personally use https://www.goggles4u.com/ https://www.goggles4u.com/, they are cheap but not quick since they probably order from China.