Q: Rider's eye cover, Breaker Gorgon, does it allow her to see what's before her? Also, the Mystic Eyes Killer Rider is wearing, does it have a comparable sealing power as this Noble Phantasm?

A: Her sight is completely sealed. Although Rider perceives the world through senses such as hearing, touch, smell, and magic-detection, she is able to acquire more precise information than sight.
About the glasses, it only seals the power of petrification. It does not act like the Breaker Gorgon, which "seals all magical properties".

Fate/complete material III; FAQ, pg. 134