Figure Legends
Fig.1. Photomacrograph of the eye of Egyptian agama, Trapelus
mutabilis (a) and Scanning electron micrograph (b, c, d) showing the
upper eyelid (Ue) with superior extension (star), lower eyelid (Le),
polygonal scales (arrow), skin sense organ (white arrowhead), and
micro-ornamentation of honeycomb-like scales (black arrowhead).
Fig.2. Scanning electron micrograph of the upper and lower eyelid of
Egyptian agama, Trapelus mutabilis showing (a, b, c) the
micro-ornamentation of honeycomb-like scales (black arrowhead) wit skin
sense organ (white arrowhead).
Fig.3. Photomicrograph of eyelids of Egyptian agama, Trapelus
mutabilis , showing (A) complete cross section of the Egyptian agama’s
eye; (U1, U2, U3) the structure of the upper eyelid and (S1, S2) its
superior extension;
Fig.4. Photomicrograph of eyelids of Egyptian agama, Trapelus
mutabilis , showing (A) complete cross section of the Egyptian agama’s
eye; (L1, L2, L3) the structure of the lower eyelid and (C1, C2)
conjunctiva surface.
Fig.5. Photomicrograph of nictitating membrane of Egyptian agama,Trapelus mutabilis , showing; (a) the location of the small third
eyelid (Nm) related to lacrimal (Lg) and harderian gland (Hg) and sclera
ossicles (So); (b) scanning electron micrograph of the surface of
nictitating membrane (Nm) has many folds marked by crypt-like
structures, and pores of lacrimal gland (zigzag arrow); (c, d,e)
photomicrograph of the transverse section of the nictitating membrane
showing external surface ( E) and internal surface (I) and its
cartilaginous support (Ce)
Fig.6. Photomacrograph of the eye’s dissection of Egyptian agama,Trapelus mutabilis , after removing the skin of the upper eyelid
to show the dorsalis rectus muscle (Drm), dorsalis oblique muscle (Dom)
and depressor palpebral inferioris muscle (Dpim).
Fig.7. Photomacrograph of the eye’s dissection of Egyptian agama,Trapelus mutabilis , after cutting the dorsalis rectus muscle
(Drm), dorsalis oblique muscle (Dom), depressor palpebral inferioris
muscle (Dpim) to show the medialis rectus muscle (Mrm), tendon of
bursalis muscle (star) and position harderian gland (Hg), ventralis
rectus muscle (Vrm), ventralis oblique muscle (Vom), lateralis rectus
muscle (Lrm), harderian gland (Hg), retractor bulbi muscle (Rbm), tendon
of bursalis muscle (star), lower eyelid (Le), and the originate sites of
these muscle on eyeball and interorbiral septusm.
Fig.8. Photo of eye of Egyptian agama, Trapelus mutabilis ,
showing the different actions; the elevation and depression of upper and
lower eyelid respectively (opening phase) (black arrow); the down action
of upper (green arrow) and up action of lower eyelid (red arrow) via the
contraction the orbicularis oculi muscle (closure phase); the adduction
and rotation of the eye ball toward the nasal canthus (blue arrow) via
contraction of medialis rectus muscle; the abduction and rotation of the
eye ball toward the nasal canthus (yellow arrow) via contraction of
lateralis rectus muscle; the depression action of eyeball via
contraction of ventralis rectus and oblique muscle (white arrow); the
elevation action of eyeball via contraction of dorsalis rectus and
oblique muscle (orange arrow); and the action of retractor bulbi and
bursalis muscle (star) yielding the pulling the eyeball inward the
socket.