Ibn Al-Haytham and Psychophysics

@article{AaenStockdale2008IbnAA,
  title={Ibn Al-Haytham and Psychophysics},
  author={Craig Aaen-Stockdale},
  journal={Perception},
  year={2008},
  volume={37},
  pages={636 - 638}
}
Persian scholar Ibn al-Haytham (‘Alhazen’) has rightly been credited with many advances in optics and vision science, but recent spurious claims that he is the ‘founder of psychophysics’ rest upon unsupported assertions, a conflation of psychophysics with the wider discipline of psychology, and semantic arguments over what it is to ‘found’ a school of thought. 

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TLDR
Alhazen clearly enunciated many of the fundamental principles which are credited to scientists living in the last two hundred years, including a theory of unconscious inference; the law of equal innervation of the eye muscles; the principles of binocular direction; constancy of size, shape, and colour; induced visual motion; and many others.

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Ptolemy's Optics which was written in about the year 150 ad contains an account of the geometry of binocular vision which has been almost totally neglected in the vision literature. An English

The History of the Treatment of Amblyopia

TLDR
Amblyopia is a decrease in visual acuity, usually in one eye, that persists after the correction of the refractive error or removal of any pathological obstacle to vision and no organic cause can normally be found.

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