Visual Evoked Potential and Pupillary Signs

Neuropathies of the optic nerve and visual evoked potentials with special reference to color vision and differential light threshold measured with the computer perimeter OCTOPUS

“…The VEPs are less delayed in AION (average value = 110 + 10.2 msec) than in RBN (See Figure 15), while the amplitudes are attenuated to a similar extent at lower visual acuities (Table 1)~ With reference to several concordant reports (Wilson, 1978;HoIder, 1981;Cox et al, 1982;W~/dberger, t984), there exists no true reduction of neural conduction in AION. The presence of a delay is rather due to an increasing dominance of paramacular VEP subcomponents (Carroll et al, 1982) Figure 36.…”

“…Several authors, cited in Cox et al (1982), reported the improvement of the latency time, although others have the opinion that the shift is definitive for all cases (see Figure 32). Long-term examination seems to play an important role: Cox et al (1982) found a delayed VEP in 75% only of a patient group studied after a minimal period of 6 months after the onset of the RBN. Our own observations confirm that a recovery of the latency time occurs in certain RBN cases.…”

Neuropathies of the optic nerve and visual evoked potentials with special reference to color vision and differential light threshold measured with the computer perimeter OCTOPUS

“…The VEPs are less delayed in AION (average value = 110 + 10.2 msec) than in RBN (See Figure 15), while the amplitudes are attenuated to a similar extent at lower visual acuities (Table 1)~ With reference to several concordant reports (Wilson, 1978;HoIder, 1981;Cox et al, 1982;W~/dberger, t984), there exists no true reduction of neural conduction in AION. The presence of a delay is rather due to an increasing dominance of paramacular VEP subcomponents (Carroll et al, 1982) Figure 36.…”

“…Several authors, cited in Cox et al (1982), reported the improvement of the latency time, although others have the opinion that the shift is definitive for all cases (see Figure 32). Long-term examination seems to play an important role: Cox et al (1982) found a delayed VEP in 75% only of a patient group studied after a minimal period of 6 months after the onset of the RBN. Our own observations confirm that a recovery of the latency time occurs in certain RBN cases.…”

Pattern Visual Evoked Potentials in the Fellow Eye of Patients with Unilateral Non-Arteritic Anterior Ischemic Optic Neuropathy

“…Başka çalışmalarda da NAİON'li hastaların tutulan gözlerindeki amplitüt düşüklüğü gösterilmiş fakat diğer gözlerinde belirgin elektrofizyolojik değişim saptanmamıştır. [22][23][24][25] Çalışmamızda NAİON geçiren olguların diğer gözlerindeki desen VEP sonuçları değerlendirildiğinde ve aynı yaş grubundaki sağlıklı bireylerin sonuçlarıyla karşılaştırıldığında, p100 dalgasının hem latans, hem de amplitüt değerlerinde istatistiksel olarak anlamlı farklılıklar izlenmiştir. Bu durum mevcut optik diskteki anatomik faktörlere bağlı olabilir.…”

Electrodiagnostic tests of the visual pathway and applications in neuro-ophthalmology

“…Pattern VEPs in non-arteritic AION typically show reduced amplitude in one eye without significant delay (Fig. 5), which frequently distinguishes it from optic neuropathy secondary to demyelinating disease e.g., it has been reported that interocular peak time asymmetry was, on average, 21 ms for optic neuritis and 3 ms for non-arteritic AION, although with some overlap [82]. Flash VEPs may also show reduced amplitude and delay, but they are generally more variable and less reliable than pattern VEPs.…”

Neuropathies of the optic nerve and visual evoked potentials with special reference to color vision and differential light threshold measured with the computer perimeter OCTOPUS

“…The VEPs are less delayed in AION (average value = 110 + 10.2 msec) than in RBN (See Figure 15), while the amplitudes are attenuated to a similar extent at lower visual acuities (Table 1)~ With reference to several concordant reports (Wilson, 1978;HoIder, 1981;Cox et al, 1982;W~/dberger, t984), there exists no true reduction of neural conduction in AION. The presence of a delay is rather due to an increasing dominance of paramacular VEP subcomponents (Carroll et al, 1982) Figure 36.…”

“…Several authors, cited in Cox et al (1982), reported the improvement of the latency time, although others have the opinion that the shift is definitive for all cases (see Figure 32). Long-term examination seems to play an important role: Cox et al (1982) found a delayed VEP in 75% only of a patient group studied after a minimal period of 6 months after the onset of the RBN. Our own observations confirm that a recovery of the latency time occurs in certain RBN cases.…”

Pattern Visual Evoked Potentials in the Fellow Eye of Patients with Unilateral Non-Arteritic Anterior Ischemic Optic Neuropathy

“…Başka çalışmalarda da NAİON'li hastaların tutulan gözlerindeki amplitüt düşüklüğü gösterilmiş fakat diğer gözlerinde belirgin elektrofizyolojik değişim saptanmamıştır. [22][23][24][25] Çalışmamızda NAİON geçiren olguların diğer gözlerindeki desen VEP sonuçları değerlendirildiğinde ve aynı yaş grubundaki sağlıklı bireylerin sonuçlarıyla karşılaştırıldığında, p100 dalgasının hem latans, hem de amplitüt değerlerinde istatistiksel olarak anlamlı farklılıklar izlenmiştir. Bu durum mevcut optik diskteki anatomik faktörlere bağlı olabilir.…”

Electrodiagnostic tests of the visual pathway and applications in neuro-ophthalmology

“…Pattern VEPs in non-arteritic AION typically show reduced amplitude in one eye without significant delay (Fig. 5), which frequently distinguishes it from optic neuropathy secondary to demyelinating disease e.g., it has been reported that interocular peak time asymmetry was, on average, 21 ms for optic neuritis and 3 ms for non-arteritic AION, although with some overlap [82]. Flash VEPs may also show reduced amplitude and delay, but they are generally more variable and less reliable than pattern VEPs.…”

Neuropathies of the optic nerve and visual evoked potentials with special reference to color vision and differential light threshold measured with the computer perimeter OCTOPUS

“…The VEPs are less delayed in AION (average value = 110 + 10.2 msec) than in RBN (See Figure 15), while the amplitudes are attenuated to a similar extent at lower visual acuities (Table 1)~ With reference to several concordant reports (Wilson, 1978;HoIder, 1981;Cox et al, 1982;W~/dberger, t984), there exists no true reduction of neural conduction in AION. The presence of a delay is rather due to an increasing dominance of paramacular VEP subcomponents (Carroll et al, 1982) Figure 36.…”

“…Several authors, cited in Cox et al (1982), reported the improvement of the latency time, although others have the opinion that the shift is definitive for all cases (see Figure 32). Long-term examination seems to play an important role: Cox et al (1982) found a delayed VEP in 75% only of a patient group studied after a minimal period of 6 months after the onset of the RBN. Our own observations confirm that a recovery of the latency time occurs in certain RBN cases.…”

Pattern Visual Evoked Potentials in the Fellow Eye of Patients with Unilateral Non-Arteritic Anterior Ischemic Optic Neuropathy

“…Başka çalışmalarda da NAİON'li hastaların tutulan gözlerindeki amplitüt düşüklüğü gösterilmiş fakat diğer gözlerinde belirgin elektrofizyolojik değişim saptanmamıştır. [22][23][24][25] Çalışmamızda NAİON geçiren olguların diğer gözlerindeki desen VEP sonuçları değerlendirildiğinde ve aynı yaş grubundaki sağlıklı bireylerin sonuçlarıyla karşılaştırıldığında, p100 dalgasının hem latans, hem de amplitüt değerlerinde istatistiksel olarak anlamlı farklılıklar izlenmiştir. Bu durum mevcut optik diskteki anatomik faktörlere bağlı olabilir.…”

Electrodiagnostic tests of the visual pathway and applications in neuro-ophthalmology

“…Pattern VEPs in non-arteritic AION typically show reduced amplitude in one eye without significant delay (Fig. 5), which frequently distinguishes it from optic neuropathy secondary to demyelinating disease e.g., it has been reported that interocular peak time asymmetry was, on average, 21 ms for optic neuritis and 3 ms for non-arteritic AION, although with some overlap [82]. Flash VEPs may also show reduced amplitude and delay, but they are generally more variable and less reliable than pattern VEPs.…”