I'd say the excessive sleeping might indicate that depression has got the upper hand - for now.

It's encouraging that you have access to medical attention. Take any cognitive therapy you can get. Given the symptoms you've described, the vision therapy you've been offered has the potential to help.

I suspect, like many of us, you're feeling burnt out, and afraid to fail. Still, consider giving therapy a chance. Let in a little sliver of hope and see if the beam doesn't grow.

Just seeing you making the effort will help your girlfriend, too. If they think we've given up on ourselves, our loved ones can't be blamed for thinking we've given up on them, too.