Eyelids

Question 1

Point of unity of eyelids

Answer 1

Lateral and medial elliptical space which appears between their margins is called palpebral fissure

Question 2

Structure: superficial to deep (7)

Answer 2

1. Skin
2. Superficial fascia
3. Palpebral part of orbicularis oculi
4. Loose connective tissue layer
5. Tarsus
6. Tarsal glands
7. Conjunctiva

Question 3

Skin

Answer 3

Very thin

Question 4

Superficial fascia (3)

Answer 4

1. Very lax
2. Delicate
3. Devoid of fat

Question 5

Palpebral part of orbicularis oculi (2)

Answer 5

1. Thin
2. Parallel to palpebral fissure

Question 6

Loose connective tissue layer (3)

Answer 6

1. Deep to orbicularis oculi
2. Contains many nerves and vessels of the eyelid
3. Local anesthesia injecting site

Question 7

Tarsus (2)

Answer 7

1. Elongated plate of dense fibrous tissue giving form and support
2. Medial and lateral ends are connected by medial and lateral palpebral ligaments

Question 8

Tarsal glands (2)

Answer 8

1. Yellowish glands arranged in single row around 30 in upper lid and few in lower lid embedded in deep groove tarsus posterior surface
2. Oily secretion prevent lacrimal fluid overflow on cheek

Question 9

Conjunctiva (6)

Answer 9

1. Transparent mucous membrane lining upper and lower eyelids
2. It is reflected over front of sclera
3. Line of reflection above: superior fornix
4. Line of reflection below: inferior fornix
5. Superior fornix receive lacrimal gland ducts.
6. Over sclera, conjunctiva is loosely connected to eyeball and on reaching cornea it continues as corneal epithelium