Effects of known variations in photopigments on L/M cone ratios estimated from luminous efficiency functions

Michelle L. Bieber, James M. Kraft, John S Werner

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The extent to which known variations in photopigment λ(max) and optical density may affect cone ratios estimated from the spectral luminous efficiency function (LEF) was examined. LEFs were generated using L- and M-cone fundamentals, one of which had been shifted in λ(max) (± 1, 2, 4 or 6 nm) or varied in peak optical density (increased or decreased by 10, 25 or 50%). A curve-fitting program was then used to estimate the L/M cone ratios for the generated LEFs assuming standard L- and M-cone fundamentals. These modeling exercises indicate that L/M cone ratios estimated from LEFs are highly correlated with long-wave sensitivity and with known variations in L-cone λ(max). Variations in M-cone λ(max) and photopigment optical density for both cone types are also correlated with L/M cone ratios, but have much less impact on the estimated ratios.

Original languageEnglish (US)
Pages (from-to)1961-1966
Number of pages6
JournalVision Research
Volume38
Issue number13
DOIs
StatePublished - Jun 1998
Externally publishedYes

Keywords

  • Heterochromatic flicker photometry
  • L/M cone ratio
  • Luminous efficiency

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

Cite this

Effects of known variations in photopigments on L/M cone ratios estimated from luminous efficiency functions. / Bieber, Michelle L.; Kraft, James M.; Werner, John S.

In: Vision Research, Vol. 38, No. 13, 06.1998, p. 1961-1966.

Research output: Contribution to journalArticle

@article{04703ce945ae40dca80c4b3c75ccd949,
title = "Effects of known variations in photopigments on L/M cone ratios estimated from luminous efficiency functions",
abstract = "The extent to which known variations in photopigment λ(max) and optical density may affect cone ratios estimated from the spectral luminous efficiency function (LEF) was examined. LEFs were generated using L- and M-cone fundamentals, one of which had been shifted in λ(max) (± 1, 2, 4 or 6 nm) or varied in peak optical density (increased or decreased by 10, 25 or 50{\%}). A curve-fitting program was then used to estimate the L/M cone ratios for the generated LEFs assuming standard L- and M-cone fundamentals. These modeling exercises indicate that L/M cone ratios estimated from LEFs are highly correlated with long-wave sensitivity and with known variations in L-cone λ(max). Variations in M-cone λ(max) and photopigment optical density for both cone types are also correlated with L/M cone ratios, but have much less impact on the estimated ratios.",
keywords = "Heterochromatic flicker photometry, L/M cone ratio, Luminous efficiency",
author = "Bieber, {Michelle L.} and Kraft, {James M.} and Werner, {John S}",
year = "1998",
month = "6",
doi = "10.1016/S0042-6989(97)00302-7",
language = "English (US)",
volume = "38",
pages = "1961--1966",
journal = "Vision Research",
issn = "0042-6989",
publisher = "Elsevier Limited",
number = "13",

}

TY - JOUR

T1 - Effects of known variations in photopigments on L/M cone ratios estimated from luminous efficiency functions

AU - Bieber, Michelle L.

AU - Kraft, James M.

AU - Werner, John S

PY - 1998/6

Y1 - 1998/6

N2 - The extent to which known variations in photopigment λ(max) and optical density may affect cone ratios estimated from the spectral luminous efficiency function (LEF) was examined. LEFs were generated using L- and M-cone fundamentals, one of which had been shifted in λ(max) (± 1, 2, 4 or 6 nm) or varied in peak optical density (increased or decreased by 10, 25 or 50%). A curve-fitting program was then used to estimate the L/M cone ratios for the generated LEFs assuming standard L- and M-cone fundamentals. These modeling exercises indicate that L/M cone ratios estimated from LEFs are highly correlated with long-wave sensitivity and with known variations in L-cone λ(max). Variations in M-cone λ(max) and photopigment optical density for both cone types are also correlated with L/M cone ratios, but have much less impact on the estimated ratios.

AB - The extent to which known variations in photopigment λ(max) and optical density may affect cone ratios estimated from the spectral luminous efficiency function (LEF) was examined. LEFs were generated using L- and M-cone fundamentals, one of which had been shifted in λ(max) (± 1, 2, 4 or 6 nm) or varied in peak optical density (increased or decreased by 10, 25 or 50%). A curve-fitting program was then used to estimate the L/M cone ratios for the generated LEFs assuming standard L- and M-cone fundamentals. These modeling exercises indicate that L/M cone ratios estimated from LEFs are highly correlated with long-wave sensitivity and with known variations in L-cone λ(max). Variations in M-cone λ(max) and photopigment optical density for both cone types are also correlated with L/M cone ratios, but have much less impact on the estimated ratios.

KW - Heterochromatic flicker photometry

KW - L/M cone ratio

KW - Luminous efficiency

UR - http://www.scopus.com/inward/record.url?scp=0031877282&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031877282&partnerID=8YFLogxK

U2 - 10.1016/S0042-6989(97)00302-7

DO - 10.1016/S0042-6989(97)00302-7

M3 - Article

C2 - 9797942

AN - SCOPUS:0031877282

VL - 38

SP - 1961

EP - 1966

JO - Vision Research

JF - Vision Research

SN - 0042-6989

IS - 13

ER -