Evoked Responses in Patients With Macular Holes

Smith, Richard; Brimlow, G. M.; Lea, S J Hardman; Galloway, Nicholas R.

doi:10.1097/00006982-199110000-00024

Cited by 4 publications

(9 citation statements)

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“…No consensus was achieved on the PRVEP latency until now. In accordance with some authors, we also found significantly prolonged N 80 and P 100 latencies in eyes with a macular hole compared to controls (Johnson et al 1987;Bass et al 1985), whereas other authors did not find significant differences between eyes with a macular hole and controls (Smith et al 1990). Kato et al (1991), found no difference in P 100 latency between affected eye and fellow eye, evoking a steady-state PRVEP with check sizes of 50' and 12'.…”

Section: Discussionsupporting

confidence: 93%

“…Authors agreed on the finding that PRVEP amplitude is significantly reduced in patients with macular hole (Kato et al 1991;Johnson et al 1987;Bass et al 1985;Smith et al 1990;Wu et al 1992). Our study confirms these results.…”

Section: Discussionmentioning

confidence: 77%

“…Few reports o n the outcome of PRVEP stimulation in patients with a macular hole were published, and the authors reported controversial results. All reports agreed that in eyes with macular holes PRVEP amplitudes are significantly reduced (Kato et al 1991;Johnson et al 1987;Bass et al 1985;Smith et al 1990;Wu et al 1992). There was no agreement however, on the PRVEP (P100) latency in macular holes.…”

mentioning

confidence: 76%

“…Whereas some authors reported a statistically significant prolongation of (P100) latency in macular holes (Johnson et al 1987;Bass et al 1985;Wu et al 1992), others did not confirm this finding (Kato et al 1991;Smith et al 1990). Results in previous reports were obtained from relatively small groups of patients; varying from 7 to 32 (Johnson et al 1987;Smith et al 1990). The check sizes used in former reports varied from 12' to 75' (Kato et al 1991;Johnson et al 1987).…”

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confidence: 93%

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Pattern reversal visual evoked potentials in eyes with macular holes and their fellow eyes

Bemelmans

Tilanus

Cuypers

et al. 1997

Acta Ophthalmologica Scandinavica

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ABSTRACT.Purpose: To investigate whether the pattern reversal visual evoked potential can be useful in the diagnosis and management of macular hole patients. Methods: The pattern reversal visual evoked potential was measured in 66 patients with a macular hole and in 43 healthy control subjects. Check sizes of 34: 17' and 10' were applied. Results: Results showed that, for the check sizes of 34: 17' and 10: eyes with a macular hole had significantly prolonged NSO and PlOO latencies and a significantly reduced PlOO amplitude as compared to their fellow eyes. Furthermore, for the 10' check size, the fellow eyes appeared to have a significantly reduced PlOO amplitude in comparison with the control eyes, whereas NSO and PlOO latencies of the fellow eyes of the macular hole patients were not prolonged. Conclusion: Significant pattern reversal visual evoked potential alterations were shown in eyes with macular holes and fellow eyes for small check sizes.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 77%

mentioning

confidence: 76%

mentioning

confidence: 93%

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Pattern reversal visual evoked potentials in eyes with macular holes and their fellow eyes

Bemelmans

Tilanus

Cuypers

et al. 1997

Acta Ophthalmologica Scandinavica

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“…This might be due to difference of the subjects investigated. The authors (Smith et al 1990; Kato et al ated PVECP amplitudes as well as poor visual acuity so that the reliability to show a latency delay may decrease. Matsui and coworkers (Matsui et al 1993) tested 5 patients with age-related macular degeneration and reported a highly significant difference in amplitudes between affected and fellow eye, but the difference in latency was not significant.…”

Section: Discussionmentioning

confidence: 99%

How are macular changes reflected in pattern visually evoked cortical potentials?

Shimada

Murayama

1997

Acta Ophthalmologica Scandinavica

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ABSTRACT. To investigate the macular contribution to the amplitude and latency of pattern visual evoked cortical potentials (PVECPs), we recorded PVECPs in patients with unilateral macular disease (retinal diseases involving the macular region) and optic neuritis. We selected patients with visual acuities better than 0.3, which is thought to be the minimum acuity to provide clearly discernible responses. The visual stimulus was a checkerboard. We vaned the check size in 4 steps as 7, 14, 28, and 56 min of arc, and the contrast was 20% or 80%. The amplitude of the sinusoidal wave of steady-state VECPs (12 Hz) and the PlOO component of a transient VECP (3 Hz) were measured. Significant attenuation and delay of PVECPs in the affected eye were found in the macular disease group. Macular disease may cause an increase of VECP latency. However, VECP seemed to be a more sensitive test of optic nerve disease than of macular disease, when patients had similar visual acuities.

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Macular electroretinograms to flicker and pattern stimulation in lamellar macular holes

et al. 1992

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Steady-state macular (9 degrees x 9 degrees) electroretinograms in response to either sinusoidal flicker (focal electroretinogram) or counterphased sinusoidal gratings (pattern electroretinogram) were recorded in 14 patients with inner lamellar macular holes, in 4 patients with full-thickness macular holes and in 14 age-matched controls. Fourier analysis of focal and pattern electroretinograms yielded three main components: a first and a second harmonic to flicker, and a second harmonic to pattern. Recent evidence indicates that the first harmonic to flicker is of receptoral origin, whereas the flicker and pattern second harmonics represent, at least in part, the activity of different generators in the inner retina. When compared to controls, patients with inner lamellar holes showed significant amplitude reduction and phase delay for both flicker and pattern second harmonics, but not for the flicker first harmonic. Patients with full-thickness holes showed significant amplitude reduction also for the flicker first harmonic. These results indicate a prevalent functional involvement of the inner retina in lamellar macular holes, which can be clinically detected by evaluating focal and pattern electroretinogram second harmonics.

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Evoked Responses in Patients With Macular Holes

Cited by 4 publications

References 0 publications

Pattern reversal visual evoked potentials in eyes with macular holes and their fellow eyes

Pattern reversal visual evoked potentials in eyes with macular holes and their fellow eyes

How are macular changes reflected in pattern visually evoked cortical potentials?

Macular electroretinograms to flicker and pattern stimulation in lamellar macular holes

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