20/20

Lenses

May 2017 Lenses

Discussion points for ANSI Z80.1 – Focimetry Issues Part One

In preparation for the 2020 revision to ANSI Z80.1, the committee has been reviewing topics relevant to the revision and seeking input. One area identified is Focimetry, where many questions are commonly asked. At the March 2017 ANSI Meeting (and subsequent Vision Council Lens Technical committee), a document I drafted was reviewed for accuracy of content. The following Focimetry related topics and responses were reviewed by both committees, and represent a consensus of opinion on the topics raised. Given the length of this document, it has been broken up into two parts.
January 2017 Eyes/Optics

When Blue Light Strikes


Our eyes are designed specifically to process light and it’s difficult to think that over the course of a lifetime that light damages them. Here is the key thought: an “Excess” of high-energy light. Exposure to all types of visible and non-visible light happens continuously and it has a direct impact on our body and mind, some positive, some negative. It’s impossible to stop the transmission of light or to know which is the most valuable for our well-being. But, based on what we’ve learned, we can certainly filter what experts have learned as potentially damaging high-energy visible light and prevent it from harming us over a lifetime.
January 2017 Eyewear

The Power and Politics Of The PD, Part Four of Four

If we look at the dynamics of oversight for prescription eyewear worldwide, we note how the regulatory atmosphere is changing with the arrival of online prescription eyewear. For example, in 2010, the Canadian Health Minister in British Colombia, responding to a court case involving a prominent online optical retailer, was prompted to review the current regulations concerning eyeglasses contained in the applicable Canada's Health Professionals Act.
December 2016 Eyewear

The Power and Politics Of The PD, Part Three of Four

If we look at the dynamics of oversight for prescription eyewear worldwide, we note how the regulatory atmosphere is changing with the arrival of online prescription eyewear. For example, in 2010, the Canadian Health Minister in British Colombia, responding to a court case involving a prominent online optical retailer, was prompted to review the current regulations concerning eyeglasses contained in the applicable Canada's Health Professionals Act.