Neutral grey-tine sunglasses should work. But standards for sunglasses seem to have slackened in recent years. 90% blockage used to be the norm and recommended. But most everything on the market now, even polarized lenses, block just 80%, pass 2x as much light. "Coppertone" branded sunglasses have been the only ones I've been able to find that are 90% blockage, polarized and discounted online.
Definitely confirm high-grade UV filtering if your lighting includes UV spectra.