Final answer:
a) Frontal Sinuses The frontal sinuses are the ones located just above the eyes, positioned within the frontal bone above the eyebrows.
Step-by-step explanation:
The sinuses located just above the eyes are the frontal sinuses. They are found within the frontal bone above the eyebrows and are the most anterior of the paranasal sinuses. In contrast, the maxillary sinuses are located below the orbits within the maxillary bones and are the largest of the sinuses. The ethmoid air cells are multiple small spaces on the sides of the ethmoid bone, between the orbit and nasal cavity, but they are not directly above the eyes. The sphenoid sinus is a midline sinus located within the sphenoid bone, under the sella turcica, and is thus the most posterior.
The sinuses located just above the eyes are known as the Frontal Sinuses. They are found within the frontal bone, just above the eyebrows. The frontal sinus is the most anterior of the paranasal sinuses.