Final answer:
The patient underwent enucleation of the left eye.
Step-by-step explanation:
The procedure that the patient underwent was enucleation of the left eye. Enucleation is the removal of the entire eyeball, while leaving the eye muscles and other surrounding structures intact. In this case, the patient's left eye was removed. The other options mentioned, implantation of muscles and reattachment of muscles to an implant, are not applicable to this procedure.