A strabismus or muscle set is a specialized collection of 15 instruments designed by Modern Surgical used in surgery to correct eye misalignment. The set includes essential tools like lid speculums to hold the eye open, fine muscle hooks to isolate the extraocular muscles, and calipers for precise measurements. Delicate scissors are used to cut the muscles from the eyeball, while specialized forceps and needle holders facilitate reattaching them in a new, adjusted position. These instruments allow the surgeon to either strengthen or weaken the muscles, thereby restoring proper eye alignment and binocular vision.