Enucleation of the eye

There are three types of eye removal:{{cite web|title=Eye Conditions|url=http://www.ericksonlabs.com/v/Artificial_Eyes/eye_conditions.asp|work=Artificial Eye Specialists|publisher=Erickson Labs Northwest|access-date=2013-02-23}}

• Evisceration – removal of the iris, lens, and internal eye contents, but with the sclera and attached extraocular muscles left behind
• Enucleation of the eye – removal of the eyeball, but with the eyelids and adjacent structures of the eye socket remaining. An intraocular tumor excision requires an enucleation, not an evisceration.
• Exenteration – removal of the contents of the eye socket, including the eyeball, fat, muscles, and other adjacent structures of the eye. The eyelids may also be removed in cases of cutaneous cancers and unrelenting infection. Exenteration is sometimes done together with maxillectomy (removal of the maxilla).

• Cancer of the eye, such as retinoblastoma and uveal melanoma
• Congenital cystic eye
• End-stage glaucoma
• Phthisis bulbi
• In cases of sympathetic ophthalmia (inflammation of the eye) to prevent travel to the other eye, which, if untreated, can cause blindness
• Constant infection in a blind or otherwise useless eye
• Painful, blind eye
• Severe injury of the eye when the eye cannot be saved or attempts to save the eye have failed, such as after a globe rupture
• In a deceased person, so the cornea can be used for a living person who needs a corneal transplant by a surgical operation called keratoplasty

{{main|Ocular prosthesis}}

Removal of the eye by enucleation or evisceration can relieve pain and minimize further risk to life and well-being of an individual with the above noted conditions. In addition, procedures to remove the eye should address the resultant appearance of the orbit. Orbital implants and ocular prostheses are used by the surgeon to restore a more natural appearance.{{cite journal |last1= Alam |first1= Mohammad Khursheed |last2= Bin Jamayet |first2= Nafij |last3= Srithavaj |first3= Theerathavaj |date= 2013 |title= A Complete Procedure of Ocular Prosthesis: A Case Report |url= https://www.researchgate.net/publication/259695035 |journal= International Medical Journal |volume= 20 |issue= 6 |pages= 729–730 |accessdate= 2023-01-03}}

An orbital implant is placed after removal of the eye to restore volume to the eye socket and enhance movement or motility of an ocular prosthesis and eyelids. The eyeball is a slightly elongated sphere with a diameter of approximately 24 millimetres.{{cite book |last1= Lemp |first1= Michael A. |last2= Snell |first2= Richard S. |date= 1998 |title= Clinical Anatomy of the Eye |url= https://archive.org/details/clinicalanatomyo0000snel/page/n3/mode/2up |location= Malden, Massachusetts |publisher= Blackwell Science, Inc. |page= 136 |isbn= 0-632-04344-X}} To avoid a sunken appearance to the eye socket, an implant approximating this volume can be placed into the space of the removed eye, secured, and covered with Tenon's capsule and conjunctiva.{{cite journal |last1= De Potter |first1= Patrick |last2= Shields |first2= Carol L. |last3= Shields |first3= Jerry A. |last4= Singh |first4= Arun D. |date= 1994 |title= Problems with the hydroxyapatite orbital implant: experience with 250 consecutive cases |url= https://bjo.bmj.com/content/bjophthalmol/78/9/702.full.pdf |journal= British Journal of Ophthalmology |volume= 78 |issue= 9 |pages= 702–706 |doi= 10.1136/bjo.78.9.702 |pmid= 7947552 |pmc= 504910 |accessdate= 2023-01-03}} Implants can be made of many materials with the most common being hydroxylapatite, metal alloy,{{cite book |last= Taylor |first= Thomas D. |date= 2000 |title= Clinical Maxillofacial Prosthetics |url= https://archive.org/details/clinicalmaxillof0000unse/page/n5/mode/2up?q=ocular |location= Carol Stream, Illinois |publisher= Quintessence Books |page= 265-276 |isbn= 0-86715-391-1}} acrylic, or glass.{{cite journal |last1= Olver |first1= Jane M |last2= Sagoo |first2= Mandeep S. |last3= Viswanathan |date= 2007 |title= UK national survey of enucleation, evisceration, and orbital implant trends |journal= British Journal of Ophthalmology |volume= 91 |issue= 5 |pages= 616–619 |doi= 10.1136/bjo.2006.103937 |pmid= 17151061 |pmc= 1954760 }}

Later, once the conjunctiva have healed and post-operative swelling has subsided, an ocular prosthesis can be placed to provide the appearance of a natural eye. The prosthesis is fabricated by an ocularist.{{cite journal |last1= Hughes |first1= Michael O. |date= 2007 |title= A Pictorial Anatomy of the Human Eye/Anophthalmic Socket: A Review for Ocularists |url= http://id3433.securedata.net/artificialeyeclinic/6Hughes.pdf |journal= Journal of Ophthalmic Prosthetics |page= 51-63 |accessdate= 2023-01-03}} Its form is that of a cupped disc so that it can fit comfortably in the pocket behind the eyelids overlying the conjunctiva that covers the orbital implant. The external portion of the ocular prosthesis is painted and finished to mimic a natural eye color, shape and luster. It can be removed and cleaned periodically by the individual or a care giver.

The two part system of orbital implant and ocular prosthesis provides a stable, and well tolerated aesthetic restoration of the eye socket. Although vision is not restored by removal of the eye with placement of an orbital implant and ocular prosthesis, a natural appearance can result. The implant, along with the attached, visible ocular prosthesis, can be moved by intact extraocular muscles that will track or move simultaneously with the other eye. The eyelids are able to move and blink over the prosthesis as well.

• {{annotated link|Eye-gouging}}
• {{annotated link|Phantom eye syndrome}}

{{reflist}}

• [http://www.ericksonlabs.com/v/Artificial_Eyes/eye_conditions.asp Leading conditions of eye loss]
• [http://geelen.com.au/stories-of-eye-loss/ Stories of eye loss]
• [https://laservisionsa.com.au/ Eye Laser treatment]

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Category:Eye surgery