Isolation of chromatic and achromatic mechanisms: A new approach

Sharanjeet Kaur Malkeet Singh, J. J. Kulikowski, D. Carden

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The purpose of this study was to optimise the testing paradigm for isolating the contributions of chromatic and achromatic mechanisms to the human spectral sensitivity function. Spectral sensitivity was determined for a test spot size of 1.2 deg presented with various spatial and temporal masks on a large, 10 deg background field of moderate intensity (1000 td) and colour temperature, CT = 2700 K. Sinusoidal temporal presentation (1 Hz) and a masking annulus of between 3 and 10 min of arc surrounding the test spot, was found to be most effective in separating chromatic from achromatic mechanisms. Square-wave (1 Hz) temporal presentation combined with the annulus was slightly less selective. The presence of the annulus did not affect the shape of flicker detection at 25 Hz which is a measure of the luminosity (achromatic) spectral sensitivity function.

Original languageEnglish
Pages (from-to)49-56
Number of pages8
JournalOphthalmic and Physiological Optics
Volume18
Issue number1
DOIs
Publication statusPublished - Jan 1998

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ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Health Professions(all)

Cite this

Isolation of chromatic and achromatic mechanisms : A new approach. / Malkeet Singh, Sharanjeet Kaur; Kulikowski, J. J.; Carden, D.

In: Ophthalmic and Physiological Optics, Vol. 18, No. 1, 01.1998, p. 49-56.

Research output: Contribution to journalArticle

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