Potentially any physical shifting title can be consciously guided for any potential goals. So if you really, really, really wanted to… No one is going to stop you.
However… why?
There are so many better things to use your energy and focus on, and even the simplest aura would give significantly more benefit than trying to change your eye color for the purposes of attraction - which is the usual reason for wanting to change one’s eye color.
And of course, the usual response to this from the communities where eye changing is popular - the subconscious/energy around us is infinite, so why not?
I’ll explain - energy might be infinite around you, but your personal one isn’t. It takes time to make the energy around you convert into one that is properly useable by you. As for the subconscious - if this was the case, there would be no need for subliminal technology.
Both of these beliefs are very surface level ideas taken from new age beliefs, with their actual deeper meanings from the traditions they were taken from removed.
Everything has a price. Make sure you’re making good deals.
I can focus on my finger for 10 seconds and have it buzzing with energy. Does this mean my finger is growing?
No.
Surface level phenomena like tingles don’t matter. Results are the metric to follow.