Waves crash, birds scream, and rain pounds. Robert Eggers’ “The Lighthouse” wants to drive you a little mad. It’s not just a film about two people on the edge of sanity, it uses sound design and filmmaking tools to push you there too. It has the feel of watching someone else’s nightmare, and it’s not one that’s going to end well. While it’s ultimately a bit too self-conscious to provoke the existential dread and true terror of the best films like it, it’s still an impressive accomplishment thanks to Eggers’ fearlessness and a pair of completely committed performances.