I'm using blender 2.92, and I can't seem to get the eyes to view as transparent in the material viewport, and even eevee rendered view. They do work in Cycles however. 

I've tried enabling screen space reflections, and refraction in the eevee settings but to no avail.

I'm sure the answer is obvious, but for some reason I'm unable to see it.

EDIT: I seem to have fixed it, I had to go into the Vonnbots2.78 blend file, and change the Transparency mode on the glass material to Alpha Blend.

i have switched from constant to beizier curves however my animtion still looks like it is in constant curve interpolation i have no idea whats wrong

More a quick tip posed as a question ;) Did you know if you enable the amaranth toolset addon, you can use Ctrl-TAB to quickly switch the action editor to a graph editor and vice versa? I use this all the time and it's so handy. Sorry if this is a cheeky place to share, but a useful workflow hint. Cheers!