Help with retinazer

I'll keep this short I'm playing master mode for the first time I've been struggling on twins and I've beaten every other mech boss and I've now twice killed spazmatism and died to retinazer 2nd phase he doesn't stop shooting lasers and I lose only like 2 hearts per hit but he shoots so often and fast I slowly lose all my health I have the queen slime mount but very rarely can I dodge all the lasers and yeah I just need some help on how to dodge it