*NURSING > HESI > Health Assessment OUTLINE 14 Chapter 14 (All)

Health Assessment OUTLINE 14 Chapter 14

Document Content and Description Below

Health Assessment OUTLINE 14 Chapter 14 Eyes External Anatomy • Bony orbital cavity surrounded by cushion of fat protects eye • Eyelids are like two movable shades that further protect eye fr... om injury, strong light, and dust • Upper eyelid larger and more mobile • Eyelashes are short hairs in double or triple rows that curve outward from lid margins, filtering out dust and dirt • Palpebral fissure: elliptical open space between eyelids • When closed, lid margins approximate completely • When open, upper lid covers part of iris • Lower lid margin, at limbus, borders between cornea and sclera • Canthus: corner of eye, angle where lids meet • Inner canthus: caruncle is small fleshy mass containing sebaceous glands • External Anatomy of the Eye Tarsal Plates • Within upper lid, they are strips of connective tissue that give it shape • Contain meibomian glands, which are modified sebaceous glands that secrete an oily lubricating material onto lids • This stops the tears from overflowing and helps to form an airtight seal when lids are closed Conjunctiva and Cornea • Conjunctiva: transparent protective covering of exposed part of eye • Palpebral conjunctiva: lines lids, is clear, with many small blood vessels • Bulbar conjunctiva: overlies eyeball, with white sclera showing through • At limbus, conjunctivae merge with cornea • Cornea: covers and protects iris and pupil Lacrimal Gland • Lacrimal gland, in upper outer corner over eye, secretes tears [Show More]

Last updated: 2 years ago

Preview 1 out of 17 pages

Buy Now

Instant download

We Accept: