iris Archives

$IR Photorefraction and IR Photokeratometry – Measuring Refractive State and Corneal Curvature in Animals and Humans$

IR Photorefraction and IR Photokeratometry – Measuring Refractive State and Corneal Curvature in Animals and Humans

Shiv Nair2022-08-19T10:47:12-04:00General Biology, Lab Animal Sciences, Vision Research|

Prof. Frank Schaeffel discusses the optical principles, image processing algorithms, calibration, and potential pitfalls within IR photorefraction and IR photokeratometry.

Echolocation with Light: A New Form of Active Sensing in Fish?

Shiv Nair2022-01-21T10:49:50-05:00General Biology, Neuroscience, Vision Research|

Prof. Nico K. Michiels discusses how weak light reflections, during active photolocation, in the pupils of predator and prey species can be strong enough to be perceptible by the initial light sender.