Ocular Prosthetics Flashcards
Which procedure scoops the goop?
removes inside of orbital contents but globe is intact
Evisceration
Which procedure removes the globe but keeps the muscles
globe and all contents removes; EOMS intact
Enucleation
Which procedure removes everything
no motility
Exenteration
removes glove, EOMs, surrounding tissue and bone
What are causes of enucleation?
painful, blind eye; pthisis bulbi, trauma, endophthalmitis; retinoblastoma
A scleral shell is used after which procedure?
enucleation
Implants are used after which procedures?
evisceration and enucleation
What are non-integrated implants made of?
think smooth
glass, acrylic, silicone
poor movement of implant
What are integrated implants made of?
think porous
hydroxyapetite (coral-like); polyethylene; aluminum oxide
better movement of implant
fibrovascular attachment
Why is tissue depth more important than material choice?
extrusion
too deep increases risk of infection
What is Post-enucleation socket syndrome?
failure to replace enough volume; deep UL sulcus; ptosis, enophthalmos
backward rotation of prosthetic
When is a conformer used?
place holder: prevents contraction of socket
evisceration and enucleation
prosthetic is fit 4-8 weeks after surgery
An oculo-dermal prosthetic is fit after which procedure?
Exenteration
Which type of prosthetic is an altered soft contact lens?
soft prosthetic
How are soft prosthetics tinted?
in office, by computer or hand painted (custom)
When soft prosthetics are used, a ________ step is needed
wash
When are soft prosthetics used?
cosmesis, sports vision, photophobia, occlusion therapy, migraines
What is the contact lens used for color deficiency?
X-Chrom
fit on non-dominent eye only
helps with color identification and matching and discernment of figures
What type of lenses are used for sports performance?
Altius daily disposables
hydrogel; amber and grey-green
thought to improve sports performance
Which type of tinted contacts are “stack” lenses?
Orion
Which type of tinted contacts are available with or without black backing?
Nissel and Cantor
Which prosthetic is <3mm thick and fits over the globe
removed nightly: helps with oxygen
scleral shell
patients still have globe or small socket; evisceration
Which prosthetic is a “full” prosthetic, > 3 mm thick and has limited motility
if peg, then porous implant
Reform Prosthetic
removed no more than 1x per month
What do we look for when evaluating the prosthetic on eye?
misalignment, color mismatch, sunken appearance
What do we look for when evaluating the prosthetic off eye?
cracks, chips; deposits; crazing (must be replaced, causes discomfort)
What removes calcium salts from a prosthetic?
GP solutions
How often are prosthetics polished?
~6 months
How often are prosthetics replaced?
~5-7 years
What is the most serious complication of prosthetics?
implant infection
