Publikation

Distance doubling visual acuity test: a reliable test for nonorganic visual loss

Wissenschaftlicher Artikel/Review - 01.06.2009

Bereiche
PubMed
DOI

Zitation
Zinkernagel S, Mojon D. Distance doubling visual acuity test: a reliable test for nonorganic visual loss. Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv für klinische und experimentelle Ophthalmologie 2009; 247:855-8.
Art
Wissenschaftlicher Artikel/Review (Englisch)
Zeitschrift
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv für klinische und experimentelle Ophthalmologie 2009; 247
Veröffentlichungsdatum
01.06.2009
eISSN (Online)
1435-702X
Seiten
855-8
Kurzbeschreibung/Zielsetzung

BACKGROUND: To determine the value of the distance doubling visual acuity test in the diagnosis of nonorganic visual loss in a comparative observational case series. METHODS: Twenty-one consecutive patients with nonorganic visual acuity loss and 21 subjects with organic visual loss as controls were included. Best corrected visual acuity was tested at the normal distance of 5 meters using Landolt Cs. The patient was then repositioned and best corrected visual acuity was tested with the previous optotypes at double the distance via a mirror. RESULTS: Nonorganic visual acuity loss was identified in 21 of 21 patients. Sensitivity and specificity of distance-doubling visual acuity test in functional visual loss were found to be 100% (CI; 83%-100%) and 100% (CI; 82%-100%), respectively. CONCLUSION: Distance doubling visual acuity test is widely used to detect nonorganic visual loss. Our results show that this test has a high specificity and sensitivity to detect nonorganic visual impairment.