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Phthisis Bulbi
It is a diseased or damaged eyeball that
has shrunk and lost function. It is congenital and
progressive. It is associated with low intraocular
pressure because the ciliary body stops
producing aqueous fluid. The atrophies and
calcifies, becoming nothing more than a lump of
tissue. Phthisis bulbi differs from "ocular
occurs from the disease, auditory and tactual
modes will need to be developed for the
success of the student.
atrophy without shrinkage" which is also a
stage in the degeneration of severely
injured or inflamed eyes.
Radiation, trauma, infection, or any
other injuries to the eye can cause this disease.
An eye with phthisis bulbi may shrink and lose
its shape, becoming distorted; the cornea may
become scarred and swollen. Cataracts can
develop, and the pressure within the eye drops
to near zero.
Visual System that is Affected
Once the intraocular pressure
approaches 0 mmHg, the cornea becomes
distorted and can develop edema and scarring,
and the lens develops cataracts. The
degenerating eye becomes soft, atrophic and
smaller than normal with a cyclitic membrane,
diminished aqueous humor production, and
detached ciliary body.
Functional Implications
Depending upon the severity of the
disease, the adaptations that might be needed
will vary. The person may need magnification to
accomplish school work such as reading and/or
math problems. Average or bright light with no
glare is necessary for viewing will create less
strain and pain on the eyes. If total blindness
Treatments
Usually the restoration of the eye is not
possible and the eye is removed and replaced
with a prosthesis.
References:
(Dohlman & D'Amico) (Cassin & Rubin,
2006, p. 208) (“International
prosthetic eye center,” 2010)
(Levack, 2007, p. 142) (Spizzichino)
(Klintworth) (Robin)
Cassin, B., & Rubin, M. (Eds.). (2006).
Dictionary of eye terminology (p.
208). Gainesville, Fl: Triad
Publishing Company. Retrieved from
http://www.faslink.org/fasmain.htm
Dohlman, C., & D'Amico, D. (1999,
January). Can an eye in phthisis be
rehabilitated? A case of improved
vision with 1-year follow-up.
Retrieved from http://archopht.amaassn.org/cgi/content/full/117/1/123
International prosthetic eye center. (2010).
Retrieved from
http://www.customartificialeyes.org/
patient-information.php
Levack, N. (2007). Low vision: A resource
guide with adaptations for students
with visual impairments (p. 142).
Austin, TX: Texas School for the
Bllind and Visually Impaired.
Spizzichino, D. (2007, April).
Neuroradiology on the net. Retrieved
from
http://neuroradiologyonthenet.blogsp
ot.com/2007_04_01_archive.html
Klintworth, G. (n.d.). Phthisis bulbi.
Retrieved from
http://eyepathologist.com/disease.asp
?IDNUM=309590
Robin, S. (n.d.). What is Phthisis Bulbi Eye
Disease? Retrieved from
http://www.ehow.com/facts_582787
2_phthisis-bulbi-eye-disease_.html
Created by: Ben Davisson