For the blind/poorly sighted -
keep the layout essentially the same every cage clean out
only ever do a partial clean, I take about a third of the cleaner substrate and put it in a box, wash the cage out, put 2/3 clean substrate in and return the original stuff and mix it in.
I always talk to my little man before I enter his cage, so he knows I am there
Never grab it. (you'll most likely get bitten)
I always pick alfie up from the same place in his cage, I tap on his shelf lightly and he comes up and climbs on.
I often show who I am by offering a bit of food for him.
When taming alfie we just fed him millet, but you do have to be confident.
edit: this is just what worked for me