Asymmetrical growth of the photopic hill during the light adaptation effect

Marie-Lou Garon, Marianne Rufiange, Ruth Hamilton, Daphne L. McCulloch, Pierre Lachapelle

Research output: Contribution to journalArticle

Abstract

In response to progressively stronger flashes delivered against a rod saturating background light, the amplitude of the photopic ERG b-wave first increases, reaches a maximal value (V max) and then decreases gradually to a plateau where the amplitude of the b-wave equals that of the a-wave, a phenomenon known as the photopic hill (PH). The purpose of this study was to investigate how the PH grew during the course of the light adaptation (LA) process that follows a period of dark adaptation (DA): the so-called light adaptation effect (LAE). Photopic ERG (time-integrated) luminance-response (LR) functions were obtained prior to (control-fully light adapted) and at 0, 5 and 10 min of LA following a 30-min period of DA.

Original languageEnglish
Pages (from-to)177-187
Number of pages11
JournalDocumenta Opthalmologica
Volume121
DOIs
Publication statusPublished - 1 Jan 2010

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Ocular Adaptation
Dark Adaptation
Growth
Light

Keywords

  • optics
  • optometry
  • vision sciences

Cite this

Garon, M-L., Rufiange, M., Hamilton, R., McCulloch, D. L., & Lachapelle, P. (2010). Asymmetrical growth of the photopic hill during the light adaptation effect. Documenta Opthalmologica, 121, 177-187. https://doi.org/10.1007/s10633-010-9243-0
Garon, Marie-Lou ; Rufiange, Marianne ; Hamilton, Ruth ; McCulloch, Daphne L. ; Lachapelle, Pierre. / Asymmetrical growth of the photopic hill during the light adaptation effect. In: Documenta Opthalmologica. 2010 ; Vol. 121. pp. 177-187.
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Garon, M-L, Rufiange, M, Hamilton, R, McCulloch, DL & Lachapelle, P 2010, 'Asymmetrical growth of the photopic hill during the light adaptation effect', Documenta Opthalmologica, vol. 121, pp. 177-187. https://doi.org/10.1007/s10633-010-9243-0

Asymmetrical growth of the photopic hill during the light adaptation effect. / Garon, Marie-Lou; Rufiange, Marianne; Hamilton, Ruth; McCulloch, Daphne L.; Lachapelle, Pierre.

In: Documenta Opthalmologica, Vol. 121, 01.01.2010, p. 177-187.

Research output: Contribution to journalArticle

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T1 - Asymmetrical growth of the photopic hill during the light adaptation effect

AU - Garon, Marie-Lou

AU - Rufiange, Marianne

AU - Hamilton, Ruth

AU - McCulloch, Daphne L.

AU - Lachapelle, Pierre

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AB - In response to progressively stronger flashes delivered against a rod saturating background light, the amplitude of the photopic ERG b-wave first increases, reaches a maximal value (V max) and then decreases gradually to a plateau where the amplitude of the b-wave equals that of the a-wave, a phenomenon known as the photopic hill (PH). The purpose of this study was to investigate how the PH grew during the course of the light adaptation (LA) process that follows a period of dark adaptation (DA): the so-called light adaptation effect (LAE). Photopic ERG (time-integrated) luminance-response (LR) functions were obtained prior to (control-fully light adapted) and at 0, 5 and 10 min of LA following a 30-min period of DA.

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KW - optometry

KW - vision sciences

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