Does Accutane cause freckles?

Hi Im 23 male. When i was younger i have so many acne on my face and also lots of Freckles. i go to the doctor and he give me Accutane. after a year i stoped using it than the acne returned in my face. now its almost 4 year im using Accutane (as my doctor say). but Lately i find more Freckles on my face.does Accutane effect on Freckles? and also how long i have to use Accutane?! can i stop using it ? (and also lately for getting rid of freckles i go to doctor and he used laser treatments).