The glasses in the movie were pure black glass mirror. There was zero roughness or bump on them, giving it that smooth finish. Kinda like a two way interrogation mirror.
Don't know if that's something that can be done in this scale? Mirrored black is more accurate to the actual glasses used but the way they lit his glasses in the movie makes it look more like the glossy black, which might be the more preferred option.
Its funny, I've heard so many opinions of what Morpheus glasses are, yet perhaps this 2-paragraph article has the best practical explanation regarding the differences in Morpheus glasses from shot to shot:
https://whatculture.com/film/10-movie-mistakes-that-were-put-there-intentionally?page=9