Definition of photorefraction in US English:

photorefraction

noun

  • 1Ophthalmology. Any of several methods of measuring the refraction or accommodation of the eye by photographic assessment of the pattern of light reflected back from the retina.

  • 2Materials Science. The phenomenon exhibited by certain materials whereby their refractive index can be modulated by incident light, e.g. from a laser; variable refraction by a material with such properties.

Origin

1970s; earliest use found in Journal of the Optical Society of America. From photo- + refraction.

Pronunciation

photorefraction

/ˌfəʊtəʊrɪˈfrakʃn/