눈의 지방의 구조 (쌍꺼풀 지방의 구조 ; Orbital fat compartment and preaponeurotic fat)
<Lower eyelid>
1. Arcus marginalis origin (periosteum, periorbita와 rim에서 1~3mm thickening되어 Fusion), not a single layer but consist of several thin membrane
2. Inferior tarsal plate lower margin 아래 5~6 mm 아래에서 CPF와 join
3. Upper reinforced protion by CPF, lower unreinforced position not supported by CPF
Capsulopalpebral fascia
A well defined connective tissue layer that mechanically links the lower eyelid with the downward retractor apparatus of the globe.
It is composed of two distinct layers that pass forward and upward from the Lockwood’s ligament as dense fibrous sheets. The anterior layer or superficial layer is coarse and inserts onto the orbital septum and deep fascia of OOM. The dense posterior layer insderts onto the inferior border of the tarsal plate.
1) CPH(Capsulopalpebral head): originate from the inferior rectus muscle fascia, wrap around the inferior oblique muscle and reaches Lockwood ligament. 7 mm thickness
2) CPF: coursing from Lockwood ligament to lower margin of tarsus and subcutaneous tissue
3) White glistening structure with two layers : anterior thin layer and posterior thick layer
Arcuate expansion :
1) Fibrous band expanding from the infra-orbital rim to the medial canthal tendon
Fanshaped and tapered before attaching to the medial canthal tendon. 2~3 mm width
2) Located deep to the orbital septum and superficial to the inferior oblique muscle.
3) Overlapped the middle part of the inferior oblique muscle as it crossed and connected to the CPF.
4) Main Lockwood ligament와 arcuate expansion은 내측으로 posterior lacrimal crest에서 origin하여 central & lateral fat fad를 나눈다.