There are many glorious science-based terms when it comes to surfing. We all talk about swells, of course, the underwater energy that creates a breaking wave. But we'll look at swell angles and ...

The first law of refraction states that the incident rays, refracted rays, and the normal to the interface at the point of incidence, all lie in the same plane. The ratio of the sine of the angle of ...

Please provide your email address to receive an email when new articles are posted on . In last month’s issue of Primary Care Optometry News I editorialized about the importance of refraction in ...

IN preparing an elementary lecture on Light, intended to be given at the Taunton College School, I have had to consider how best to explain the somewhat abstruse principle of optical refraction. It is ...

Ukraine-Russia war latest: Trump warns Putin ‘we have a nuclear submarine off your shore’ after cruise missile test Pauline Hanson changes party name as polling support surges How Epstein and Andrew ...

We find the definition of “subjective refraction” as proposed by Dr. Louis Catania in his commentary, “Delegating refraction: technician collects data, doctor performs subjective refraction” ...