This is a picture of Corey playing with my husband. John wraps her up in a t-shirt and bounces her above the bed in a birdie sling. She loves it: makes chicken sounds.
It's only taken us 20+ year for her to be willing to be on her back. When we first got her [as an adult] she would NOT step up to our hand. It "only" took about 6 months before she was willing to come out of her cage onto our hand. Like you guys say: it's "grey time".
So cute! My greys would never allow that, but my amazon, LOVES it! She will grip my fingers & I swing her gently on my lap saying, "swing the baby!" She enjoys it for a while..until she doesn't, then you know what she does..bites to let me know she's done..:LOL
Can greys get cataracts? That was my first thought when you mentioned they have turned hazy.
As others have said I think the only way of finding out is to find an avian vet. I sympathise for trying to find a local one. Unfortunately avian care isn't taught as standard for vets- they have to take on additional studies to learn how to treat birds/parrots properly.
How old is your bird? Very old birds unfortunately can experience vision loss over time. As Timbersmom has mentioned, I'd have him evaluated by an avian vet if one is available in your area.