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. Author manuscript; available in PMC: 2024 Mar 1.
Published in final edited form as: Vision Res. 2022 Dec 16;204:108161. doi: 10.1016/j.visres.2022.108161

Figure 1.

Figure 1.

Ambient light spectra. Panel A illustrates the spectra of the colony fluorescent lights. This has a “spectral STOP drive” (normalized to 1.0) to oppose becoming myopic. Tree shrews emmetropize reliably and accurately under this illumination. Panels B and C show the spectra of ambient lights of limited bandwidth: Blue+Green, and Blue+Cyan. These lights have progressively lower “spectral STOP drive” numbers, and hence are potentially less effective in providing emmetropization system information to generate strong STOP signals that prevent myopia. Panel D shows the spectrum of cyan narrow-band light which has a spectral STOP drive of 0.08 and very little STOP signal so that myopia develops rapidly (Norton et al., 2021).