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NR 10-12/2008
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Zaburzenia pola
widzenia w druzach tarczy nerwu wzrokowego
Visual field defects in the
optic disc drusen
Iwona Obuchowska, Zofia Mariak
Z Kliniki Okulistyki Uniwersytetu Medycznego w Białymstoku
Kierownik: prof. dr hab. n. med. Zofia Mariak |
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| Summary: |
Purpose: To
evaluate the visual field defects in patients with
visible and buried optic disc drusen.
Material and methods: 40 patients (22 women and
18 men, mean age 49.8 years) with optic disc drusen were
studied prospectively for clinical and
electrophysiological evidence of impaired optic nerve
function. Visual acuity, colour perception, presence of
an afferent pupillary defect, visual evoked potentials (VEP),
and visual field were analyzed. The visual field defects
were classified by their predominant pattern.
Statistical analysis was performed using a chi-squared
test and the Fisher exact test.
Results: The visual field defects were found in
63.2% of eyes with optic disc drusen. The two most
common pattern of visual field loss were enlargement of
blind spot and nerve fiber bundle defects. 76.3% of eyes
with visible optic disc drusen had abnormal visual
fields compared with 46.5% of eyes with buried drusen,
p=0.011. Results of electrophysiological studies showed
abnormal VEPs in 44.7% of eyes with visible drusen an in
20% of eyes with buried drusen, p=0.032.
Conclusion: Visual field loss are the most common
visual symptoms in the optic disc drusen. Visual field
defects in eyes with visible drusen are more frequent
than in eyes with buried drusen. Changes in perimetry
are strongly associated with visual acuity loss and
abnormal VEP. |
| Słowa kluczowe: |
druzy tarczy nerwu
wzrokowego, poszerzenie plamy ślepej, mroczki pęczka
włókien nerwowych, koncentryczne zawężenie. |
| Key words: |
optic disc drusen, blind
spot enlargement, nerve fiber bundle defect, generalized
constriction. |
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