Information, Symptoms, Resources, Treatments and Tools for squint surgery.

After a successful squint surgery can my eye start turning again with time?

my doctor said there’s not thing to worry about but my left eye looks like it can’t focus on an object. I had a squint surgery almost 3 years ago and it was successful, after this much time can it start turning again or am i just being paranoid? How much does squint surgery effect last?
if it starts turning again can i have additional surgery?