After enucleation or evisceration, most of the lost volume is replaced by a spherically shaped implant or fatty tissue from the patient’s own body placed in the eye socket. Implants can be made of a variety of materials including acrylic, hydroxyapatite, porous polyethyline, or dermis fat, among others.
What are sclera shells?
The term scleral cover shell is a type of ocular prosthesis that is fabricated to be worn over an existing eye. These patients whose existing eye is blind and shrunken due to disease, injury or evisceration.
Which structure of the eyeball is preserved in evisceration?
Evisceration is a surgical technique by which all intraocular contents are removed while preserving the remaining scleral shell, extraocular muscle attachments, and surrounding orbital adnexa.
What is the purpose of an evisceration?
Evisceration is an ophthalmic surgery that removes the internal contents of the eye followed usually by placement of an orbital implant to replace the lost ocular volume.
Is sclera removed in enucleation?
Enucleation is in contrast to evisceration, in which the ocular contents are removed from an intact sclera, and exenteration, in which the entire orbital contents, including the globe and soft tissues, are removed.
What is wound evisceration?
Evisceration is the uncontrolled exteriorization of intraabdominal contents through the dehisced surgical wound outside of the abdominal cavity. Evisceration may occur from omentum but is of greatest concern when bowel protrudes through the separated fascia.
What is a scleral shell made of?
Scleral shell prostheses are more akin to prosthetic eyes than prosthetic contact lens in that they cover the entire globe and are made from (poly) methyl methacrylate (PMMA). They are also custom made in New Zealand and qualify for a subsidy from the Ministry of Health.
For what reason is the sclera left in place when an evisceration is performed?
An evisceration removes the internal contents of the eye and leaves the sclera to prevent spread of the infection to the tissues around the eye. If the sclera, the outer covering of the eye, is also infected then an enucleation, with complete removal of the eye, is necessary.
What happens evisceration?
Evisceration is a rare but severe surgical complication where the surgical incision opens (dehiscence) and the abdominal organs then protrude or come out of the incision (evisceration).
What is the difference between evisceration and scleral shell?
The white part of the eye (the scleral shell) and the eye muscles are left intact. The implant is then placed into the scleral shell to which the muscles are still attached. Of the two procedures, evisceration generally takes less time and is less invasive.
What part of the eye is removed During evisceration?
During an evisceration, the cornea (clear, dome-shaped window at the front of the eye) and the contents of the eye are removed. The white part of the eye (the scleral shell) and the eye muscles are left intact.
What is the difference between an enucleation and an evisceration?
The entire eye (globe) is removed in an enucleation. The muscles that control eye movement are left intact and are resewn to the spherical implant (artificial eyeball). Evisceration. During an evisceration, the cornea (clear, dome-shaped window at the front of the eye) and the contents of the eye are removed.
