Semantics or Pet Peeve?

As I learn more and more about the light spectrum, the phrase "Blue Light Blocking" has never really seemed like an accurate term.  When I hear that something blocks the blue light, I think of a literal block like a big brick wall that blue light doesn't dare cross.  But this isn't really true.  The lens and coating technology is more of a filter than a block... filtering a certain section of the blue light spectrum.

I'm always intrigued by articles and company reps who talk about the latest advances in filtering blue light (well, let's be honest... 90% of the time, I'm hearing about "blue blockers").  Nothing should be blocking blue light completely, in fact a good chunk of blue filters aren't filtering the right end of the blue light spectrum.  

To my fellow Opticians, I say challenge the reps and companies to find out what section of the spectrum their lenses and coatings are filtering.  Why are some companies filtering out wave lengths from 470nm - 500nm when we should really be focusing on the lower and most dangerous end of the spectrum (400nm - 470nm)?  This isn't exactly a topic that's going to go away with the constant advances in new computer screens, cellphones, and any device emitting harmful blue lights.  

Obviously language is important to me because when speaking to patients, I want to make sure the information I'm giving is as accurate as possible.  Informed Opticians help create informed patients.