Your bird’s vision is better then mammals*. 
Their range of motion is limited but compensated for by the bird’s flexible range of motion with their head and neck.
The avian eye takes after that of a reptile, with ciliary muscles that can change the state of the focal point quickly and to a more noteworthy degree than in the well evolved creatures. Winged creatures have the biggest eyes in respect to their size in the set of all animals, and development is therefore restricted inside the eye’s hard socket.[1] notwithstanding the two eyelids typically found in vertebrates, it is secured by a third straightforward mobile film. The eye’s inward life systems is like that of different vertebrates, however has a structure, the pecten oculi, one of a kind to winged animals.
You can find great toys your parrot will love and help exercise their eye site and overall foraging instinct here with foraging toys and treats.
* https://en.wikipedia.org/wiki/Bird_vision
