Cleomedes (C. 1St Century Ad) on the Celestial Illusion, Atmospheric Enlargement, and Size – Distance Invariance

@article{Ross2000Cleomedes1,
  title={Cleomedes (C. 1St Century Ad) on the Celestial Illusion, Atmospheric Enlargement, and Size – Distance Invariance},
  author={H. Ross},
  journal={Perception},
  year={2000},
  volume={29},
  pages={863 - 871}
}
  • H. Ross
  • Published 2000
  • Psychology, Medicine
  • Perception
Cleomedes (Kleomedes) is a little-known Greek author (c. 1st century AD) who produced what is probably the earliest extant statement of size – distance invariance. He supported the Stoic philosophy and was concerned to discredit the Epicurean position that we perceive objects as having their true size. He explained the celestial illusion (the apparent enlargement of the sun near the horizon) in two ways: partly as a refractive effect of the atmosphere similar to angular enlargement when looking… Expand
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