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Tenon's capsule (/ t ə ˈ n oʊ n /), also known as the Tenon capsule, fascial sheath of the eyeball (Latin: vagina bulbi) or the fascia bulbi, is a thin membrane which envelops the eyeball from the optic nerve to the corneal limbus, separating it from the orbital fat and forming a socket in which it moves.
effectively two small canulae fitted together, one to introduce fluid and the other to extract the cortical materials, blood, etc. in eye operations •Lacrimal canula small curved canula the size of a syringe needle used to introduce fluids or drugs into the nasolacrimal passage to test its patency or during surgery ( dacrocystography ...
Human eye. The ocular immune system protects the eye from infection and regulates healing processes following injuries. The interior of the eye lacks lymph vessels but is highly vascularized, and many immune cells reside in the uvea, including mostly macrophages, dendritic cells, and mast cells. [1]
In laser suture lysis a red light laser and a contact lens are used to penetrate noninvasively the overlying conjunctiva and cut the black nylon suture. Some surgeons prefer adjustable flap sutures during the trabeculectomy that can be loosened later on with forceps in a slit lamp office procedure.
This ligament is responsible for maintaining and supporting the position of the eyeball in its normal upward and forward position within the orbit, and prevents downward displacement of the eyeball. [2] It can be considered a part of the bulbar sheath. [3] It is named for Charles Barrett Lockwood.
Methods to prevent intraoperative corneal injuries include [citation needed] simple manual closure of the eyelids; holding the eyelids shut with tape or a general purpose adhesive dressing; use of a specially designed eyelid occlusion dressing; use of eye ointment (although this is controversial, see below) bio-occlusive dressings; suture ...
Eye infection occurs at a rate between 1 in 1100 and 1 in 1900 and can lead to permanent loss of vision if not properly treated. [15] Surgeons take many measures to prevent infection such as careful surgical draping, using povidone iodine as both drops and a solution to soak the sutures in, as well as a post-op course of steroids and ...
The blood–ocular barrier is a barrier created by endothelium of capillaries of the retina and iris, ciliary epithelium and retinal pigment epithelium. [1] It is a physical barrier between the local blood vessels and most parts of the eye itself, and stops many substances including drugs from traveling across it. [2]