External Eye Flashcards
What are the four Extrinsic Rectus muscles of the eye?
Lateral, Medial, Dorsal, and Ventral
What are the two External Oblique muscles of the eye?
Dorsal and Ventral
What extrinsic muscle surrounds the Optic Nerve at the back of the eye?
Retractor muscle
What is the function of the Retractor Bulbi?
Forced the third eyelid across the surface of the cornea as a protective mechanism
What are the Eyelids called?
Palpebra (Dorsal+ Ventral)
What is the area where the Dorsal and Ventral Palpebra meet both Medial and Lateral?
Canthi
What is the membrane that covers the inside of the eyelid/ Palpebra?
Conjunctiva
What is known as the third eyelid?
The Nictitating Membrane
What gland of the Nictitating membrane produces Tears?
Nictitans Glands
How many tear glands does each eye have and what are they?
Two:
Lacrimal Gland
Nictitans Gland
Where do tears drain?
The Lacrimal Puncta
Tears drain from the Lacrimal Puncta. Where are the Lacrimal Puncta located?
Medial Dorsal Canthus and Medial Ventral Canthus (Inner corners of the eyelid - top and bottom)
Tear Drainage Route
Lacrimal Puncta
Canaliculi
Lacrimal Sac
Nasolacrimal Duct
What is the term for tear overflow (watering eyes)
Epiphora
Where do the Lacrimal Puncti lead?
Superior and Inferior Canaliculi
