Supraorbital foramen

At the spot where the inner third and outer two-thirds of the superior rim of the orbit meet, there’s a tiny notch or sometimes an opening called the supraorbital notch or supraorbital foramen. This notch or foramen is important because the supraorbital vessels and nerve go through it.

• The supraorbital nerve is a branch of the frontal nerve, which in turn arises from the ophthalmic division of trigeminal nerve. Usually it's the lateral branch of supraorbital nerve which goes through the supraorbital foramen, travels up across the forehead, and finishes in the anterior region of the scalp.

• The supraorbital artery and vein stem out from the ophthalmic artery and vein, and play a vital role in supplying blood to the frontal bone, the skin on the upper eyelid, forehead, and scalp, as well as to some extraocular muscles, including the superior rectus, levator palpebrae superioris, and superior oblique muscles.