1
.
| Frontal sinus |
2
.
| Superior oblique muscle |
3
.
| Reflected part of tendon of superior oblique muscle (the thick fascia which surrounds the tendon blends with fascia of the levator and superior rectus muscles as well as with the bulbar fascia) |
4
.
| Supratrochlear nerve |
5
.
| Ophthalmic artery |
6
.
| Fascia covering medial rectus muscle |
7
.
| Anterior ethmoidal artery and nerve (entering anterior ethmoidal foramen) |
8
.
| Superior oblique muscle |
9
.
| Levator palpebrae superioris muscle |
10
.
| Posterior ethmoidal artery (posterior ethmoidal nerve absent) |
11
.
| Upper pointer: Common annular tendon Lower pointer: Trochlear nerve (IV) |
12
.
| Optic nerve (II) |
13
.
| Corrugator supercilii muscle |
14
.
| Supraorbital artery (supraorbital branch of ophthalmic artery absent in this specimen) |
15
.
| Supraorbital nerve |
16
.
| Communicating branch between supraorbital nerve and facial nerve |
17
.
| Periorbita at supraorbital margin |
18
.
| Aponeurosis of levator palpebrae superioris muscle |
19
.
| Superior lacrimal gland |
20
.
| Superior rectus muscle |
21
.
| Eyeball |
22
.
| Lateral rectus muscle |
23
.
| Lacrimal nerve |
24
.
| Superior orbital fissure (opened) |