Lecture 11 Anatomy of the eye-2

Lecture 11 Anatomy - Special Senses The Anatomy of the Eye Ocular Adnexa(structures surrounding the eye Eyelids Conjunctiva Lacrimal Apparatus

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Special Senses: The Anatomy of the Eye •Ocular Adnexa (structures surrounding the eye) •Eyelids •Conjunctiva •Lacrimal Apparatus •Extrinsic muscles of the eye •Globe •Three tunics •Fibrous •Vascular •Nervous Range of Visual Field Predator: Binocular vision Eyes positioned to face forward Prey Animals: Greater peripheral range Eyes positioned on sides of head
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Range of Visual Field Ocular Adnexa Palpebrae (eyelids) – two mobile folds of haired skin that protect the anterior aspect of the eyeball –The gap between the margins of the two lids is the palpebral fissure –Modified sweat and sebaceous glands are associated with the lid margin » Tarsal glands ( Meibomian glands ) are clinically significant because they commonly become infected, develop tumors, or become impacted (stye)
Background image of page 2
3 Ocular Adnexa Conjunctiva – the mucous membrane that lines the inside of the eyelids and the anterior surface of the eyeball (excluding the clear cornea) –Rich in mucus-producing glands, lymphocytes, nerves, and blood vessels • Domestic species possess a nictitating membrane or third eyelid
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 The External Eye The Nictitating Membrane Prolapsed gland of the third eyelid “cherry eye”
Background image of page 4
5 Lacrimal Apparatus • Series of glands and the duct systems that drain their secretions from the conjunctival sac • Provides a moist environment for the anterior surface of the eye Lacrimal gland – its secretion and that of the gland of the third eyelid is the major contributor to tear film Lacrimal Apparatus (cont.) • Tears drain from the conjunctival sac via two small openings (the inferior and superior lacrimal puncta ) on upper and lower lids near the medial corner. –join one another at a small sac near the
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/30/2011 for the course ANSC ANSC211 taught by Professor Black during the Fall '11 term at Maryland.

Page1 / 24

Lecture 11 Anatomy - Special Senses The Anatomy of the Eye Ocular Adnexa(structures surrounding the eye Eyelids Conjunctiva Lacrimal Apparatus

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online