The eye uses longitudinal chromatic aberration and blur cues to determine the direction of accommodation
Scientific literature demonstrates that the human eye uses longitudinal chromatic aberration and the resulting chromatic blur cues to guide and determine the direction of accommodation.
Paper [3] directly supports the claim by stating that longitudinal chromatic aberration creates a chromatic blur on the retina that acts as an important cue for accommodation. Paper [1] supports the theoretical relationship between accommodation and longitudinal chromatic aberration. Paper [0] discusses blur cues in general but is primarily about disparity and Down syndrome, making it tangential. The evidence supports the claim.
David A. Atchison, George Smith, Michael D. Waterworth. Theoretical Effect of Refractive Error and Accommodation on Longitudinal Chromatic Aberration of the Human Eye. 1993. https://doi.org/10.1002/j.1538-9235.1993.tb03208.x
This theoretical study models how longitudinal chromatic aberration changes with accommodation, laying the groundwork for understanding how optical dispersion relates to focusing.
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Maydel Fernandez-Alonso, Abigail P. Finch, Gordon D. Love, Jenny C. A. Read. Accommodation and wavelength: the effect of longitudinal chromatic aberration on the stimulus-response curve. 2023. https://doi.org/10.1101/2023.06.20.545755
This recent study explicitly confirms that longitudinal chromatic aberration creates a chromatic blur on the retina that serves as an important cue for accommodation.
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