2019年7月11日 · There is a sympathetically-innervated muscle in the lower eyelid that functions as the analogue of the Müller muscle, the capsulopalpebral (inferior tarsal) muscle, which inserts on the lower border of the lower eyelid tarsus.

POSTERIOR BORDER of the eyelid is Sharper GREY LINE : marked in the picture below, divides the eyelid vertically into an anterior lamina and a posterior lamina . We shall be discussing what is anterior and posterior lamina in detail when we talk about the layers of eyelids.

2014年1月29日 · The eyelid margin describes the portion located at the edge of the eyelid. It is the juncture of the conjunctiva and the skin, known as the mucocutaneous margin. It is the site of the eyelashes as well as the orifice (opening) of the meibomian glands .

2024年11月11日 · Less prominent, marks the boundary between the eyelid and cheek area. These folds on the lower eyelid limit the spread of blood or fluid into the cheek. The inner angle where eyelids meet, separated from the eyeball by the tear lake (lacus lacrimalis).

The free lid margin is a smooth strip of epidermis limited by the anterior and posterior lid borders. The outer anterior lid border with the eyelashes. The inner posterior eyelid border with the line of MARX and lid wiper. The line of Marx corresponds to the mucous-cutaneous junction and is the bottom of the tear meniscus

2018年6月3日 · The sympathetically innervated Müller’s muscle arises from the posterior surface of the levator muscle, and inserts into the superior border of the tarsus. Contraction elevates the lid by up to 2 mm.

2023年10月30日 · Functionally, eyelids assist in regulating the amount of light reaching the eye, maintaining and distributing the eye's tear film during blinking and maintaining tear flow, by acting on the conjunctival and lacrimal sacs. The eyelids are thin mobile folds of soft tissue covering and protecting the anterior surface of the eyeball.

2016年7月11日 · Knowledge of the relationship between structure and function in the human eyelid is essential to understand its anatomic complexity (Fig. 1). The primary function of the eyelid is to protect the eye and to preserve vision.

2023年2月18日 · The upper eyelid extends from the superior boundary of the palpebral fissure to the eyebrow. Similarly, the lower eyelid extends from the inferior boundary of the palpebral fissure to merge into the cheek. The upper and lower eyelids meet each other at an angle of about 60 degrees at medial (nasal)and lateral (temporal) canthi.

2017年4月1日 · Structures that should be considered in the description of eyelid anatomy include the skin and subcutaneous tissue, orbicularis oculi muscle, submuscular areolar tissue, fibrous layer consisting of the tarsi and the orbital septum, lid retractors of the upper and lower eyelids, retroseptal fat pads, and conjunctiva.