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 ...

An automated refraction eye test is one of the ways we can measure how well you can see and helps your optometrist determine the prescription (lens strength) you need to see clearly. Using a machine ...

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 ...

Who amongst us is not in search of a better way to refract? While our time-honored subjective refraction – a delicate blend of objective measurement and patient commentary – has served patients well ...

If the light rays are travelling from one medium to another they change their direction at the boundary between two mediums. When the light rays either bend or change their direction while passing ...

Indie Grewal and Keith Tempany look at both sides of the argument We asked longstanding friends and myopia management advocates, Keith Tempany and Indie Grewal, to tackle some of the most contentious ...

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 ...