hello a. multiple times depending on type and amount of squint b.hello treatment of squint (exercise or surgery) depends on type and amount of squint being squint specialist , i need to see photo of ur eyes so that i may guide you better

Replied earlier, lazy eye(amblyopic eye)can not  operated again & again , maximum twice in life time.

Hello....... The squint has to be evaluated and appropriate treatment given as early as possible. Muscle exercises can be helpful in treating a form of squints in adults in which the eyes cannot align themselves for close work or reading. Eye glasses with prisms can correct mild double vision associated with squints in adults.Eye muscle surgery is the most common treatment for squint.