Figure 3: Supraorbital and supratrochlear nerve blocks. Figure 5: Infraorbital nerve and the area of anesthesia covered by blocking it. SO ST 17mm 27mm Figure 4: The area of anesthesia covered by supraorbital and supratrochlear nerve blocks. 40 Figure 6: Trans-nasal approach to the infraorbital nerve block. American Society of Regional Anesthesia and Pain Medicine 2017