you have to be careful there. a dorsal slit often has bad cosmetic consequences, unless the doctor is really caring. if he or she stitches it up properly, there is mere scarring, and a functional foreskin.
if they don't, it flaps like the skin of a turkey neck, and does nothing to protect the glans.
the OP already can retract. stretching for a week will avoid the need for any surgery, hence, no recovery time.