1
.
| Frontal sinus (opened) |
2
.
| Position of superior oblique muscle |
3
.
| Branch of frontal nerve which communicates with infratrochlear nerve |
4
.
| Fascia of superior oblique muscle |
5
.
| Ophthalmic artery |
6
.
| Olfactory nerve (I) |
7
.
| Infratrochlear nerve |
8
.
| Superior ophthalmic vein |
9
.
| Olfactory bulb |
10
.
| Anterior ethmoidal nerve |
11
.
| Ethmoidal air cell (medial) |
12
.
| Superior oblique muscle |
13
.
| Upper pointer: Posterior ethmoidal artery Lower pointer: Ethmoidal cell (posterior) |
14
.
| Trochlear nerve (IV) |
15
.
| Roof of optic canal (upper root of lesser wing of sphenoid bone |
16
.
| Dura mater and optic nerve (II) |
17
.
| Anterior clinoid process |
18
.
| Supratrochlear nerve |
19
.
| Frontal nerve (supraorbital and frontal branches not separated) |
20
.
| Fascia of levator palpebrae superioris muscle |
21
.
| Levator palpebrae superioris muscle |
22
.
| Fascia of superior rectus muscle |
23
.
| Periorbita |
24
.
| Superior rectus muscle |
25
.
| Lacrimal nerve, artery, and vein |
26
.
| Temporalis muscle |
27
.
| Superior ophthalmic vein |
28
.
| Frontal nerve |