Bilateral ptosis and ectropion repair involves surgically correcting both drooping eyelids (ptosis) and outward-turning eyelids (ectropion) on both eyes. Ptosis repair typically involves tightening or shortening the muscle that raises the upper eyelid, while ectropion repair focuses on tightening and re-positioning the lower eyelid. The specific techniques used can vary depending on the severity and cause of each condition.