2015, Number 1
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Rev Cub Oftal 2015; 28 (1)
Electrophysiology of vision and generalization of normative studies in healthy individuals
Hernández EO, Columbié GYE, Hernández SY, Llanes RR, Castells FR, Ferro HD
Language: Spanish
References: 13
Page: 23-33
PDF size: 127.93 Kb.
ABSTRACT
Objective: to obtain normative data of standard and pattern electroretinography as
well as pattern and diffuse light visual evoked potentials from a group of healthy
individuals.
Methods: a prospective and descriptive study conducted in healthy subjects who
were seen at the neurophthalmology service in "Ramón Pando Ferrer" Cuban Institute
of Ophthalmology in a six-month period. Sixty eyes of adults aged 20-40 years of
both sexes with normal ophthalmologic physical examination results were included.
Results: mean values of amplitude and latency at the wave peak of P50 for the
pattern electroretinogram were 1,75 microvolts and 53,7 ms. The standard
electroretinogram showed b-wave amplitude values of 300, 550 and 290 microvolts
for scotopic, mesopic and photopic responses, respectively. The latency of the
P100 wave peak in pattern visual evoked potentials at 60 and 20 minutes of arc were
107 and 110 ms and at the diffuse light response, P-2 value was 110 ms with
interocular difference lower than 5 ms in both studies.
Conclusions: the suggested electrophysiological studies show normal useful values in
the evaluation of pathological findings indicative of visual functional impairment at
different levels and they may serve as a valid tool of reference for the rest of visual
electrophysiology laboratories located in the ophthalmological centers nationwide.
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