This fully interactive online application simulates the function of a phoropter, which is used for subjective refraction procedures (eye exams). You can change length and direction of the ray, the refraction index and in test mode the ray resolution. Press [blanc] to change test mode and [r] to reset. Microscope, light, speed, moon, dispersive, emission, spectra, absorption, Snell, Descartes, refraction, reflexion, converging, diffraction, wave, frequency, Gauss.
A 3D simulation of the refraction of light through a rectangular block. KS3, KS3, KS4 An interactive teaching aid to show the Law of Reflection. The angle of the . Brien Holden Vision Institute: Virtual Refractor Online. simulates a distance and near subjective optometric refraction, using a refractor head on virtual patients.