Me nephew is about 7 months old and has what seems to be a lazy eye in his left eye- can this be fixed?

Yes!: It's critical to get problems with eye coordination addressed early because they can result in vision impairments later in life if left untreated. He should be evaluated by a pediatric ophthalmologist. Expect eye-patching which covers the 'stronger' eye and to discuss further options with the doctor.

Lazy eye: Yes take him to a pediatric eye doctor asap.