Objective Assessment of the Central Visual Acuity by Means of the Visual Evoked Potentials
Authors:
L. Hejsek 1; H. Langrová 2; J. Pašta 1; P. Rozsíval 2
Authors‘ workplace:
Oční klinika 1. LF UK a ÚVN, Praha, přednosta plk. doc. MUDr. Jiří Pašta, CSc.
1; Oční klinika FN UK, Hradec Králové, přednosta prof. MUDr. Pavel Rozsíval, CSc.
2
Published in:
Čes. a slov. Oftal., 65, 2009, No. 6, p. 227-233
Category:
Overview Report
Overview
The authors refer about the possibility, method, testing and results of objective assessment of the central visual acuity in healthy and visually impaired volunteers. The principle of the method is (using visually evoked potentials – sweep VEP) extrapolation of the maximal perceived spatial frequency, or the minimal angle of separation, which represents the visual acuity. Altogether 73 persons (54 healthy and 19 objectively visually impaired) were examined, the visual acuity established using the ETDRS chart was compared to the acuity extrapolated from the sweep VEP. Results obtained by means of those two methods did not statistically significantly correlate.
Conclusion:
The objective testing of the visual acuity we do not recommend for routine use, the examination is at this time used for the purpose of estimation of the visual acuity and objectification of visual pathway functionality as a whole.
Key words:
visual acuity, evoked potentials, sweep VEP
Sources
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Labels
OphthalmologyArticle was published in
Czech and Slovak Ophthalmology
2009 Issue 6
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