I do understand with such a power difference between both eyes,there are chances of getting amblyopia( lazy eye) unless you were diagnosed and treated in your childhood age.
But be happy that you have at least 60 percent of your good vision,which is one positive thing to consider.
But why was the lens
replacement surgery advised? Is it for both the eyes or do you have any cataract
change in either eye? And by under development,did you mean any retina
If you could explain little more for my questions, then I can suggest you better regarding the surgical question. Get back to us soon.