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. Author manuscript; available in PMC: 2009 Nov 5.
Published in final edited form as: Vision Res. 2008 Sep;48(19):1929–1939. doi: 10.1016/j.visres.2008.06.021

Figure 4.

Figure 4

A) The effect on M-cone modulation of changing the focal plane, as a function of spatial frequency, when the eye is affected by LCA. M-cone contrast is only shown for the normal M-cone pigment (M-cone extinction spectrum with a peak at 530 nm). M-cone contrast depends critically on the plane of focus, being maximal at focal planes that lie close to the peak of the M-cone extinction spectrum. B) The effect on M-cone contrast of shifting the peak of the M-cone extinction spectrum, as a function of spatial frequency, when the eye is affected by LCA, and focused to maximize luminance contrast. M-cone modulation is maximal for the normal M-cone pigment (peak at 530 nm).