One of my boys has deuteranopia. He sees a red dot as grayish.. but said “bright blue” in regards to this Lucid optic

Interesting, my image got flipped somehow! No, I’m primarily a righty, though I can shoot left handed well enough. The gun is a right hander though.

And yes I agree, the reticle doesn’t show up well in the photo, it’s better in person.

That’s true and not true at the same time.

Basically and briefly to avoid a longer explanation – its a matter of physics: The human eye is not very good at filtering blue light. This means that of light colors more blue light can enter the eye than other colors. This is basically where the claim comes from that “the human eye is more sensitive to blue light that any other color”. In reality its not a ‘sensitivity’ in terms of seeing blue light better, its a ‘sensitivity’ in terms of the eye not filtering blue light very well. Because the human eye does not filter blue light very well, a point source (e.g. a blue light bulb, a blue reticle in a dot sight, etc…) of blue light actually overwhelms vision acuity for light color and depending on how intense the blue light is may seem to be perceived as being seen better but in reality its our brains playing tricks on us by trying to equate the blue light to a ‘normal’ color for focus.

Because the blue component of the light is basically not filtered it can be said “the human eye is more sensitive to blue light than any other color”, but in terms of eye vision focus and sensitivity it doesn’t mean you can actually see blue light better than other colors of light. And of course if you have a ‘red/green’ color blindness issue or another ‘color vision or vision’ issue – because blue light is basically not filtered by the eye a person may perceive blue light better.

Virtually all visible blue light passes through the cornea and lens and reaches the retina, for other colors the light is filtered through the cornea and lens before it reaches the retina. This in reality is a problem. Because blue light scatters more easily than other visible light, it’s not as easily focused. This is where our brains start playing tricks on us, by making us think we are focused as it tries to equate the blue light to a ‘normal’ color for focus but here again it depends on the intensity of the blue light as the less intense the less our eyes are overwhelmed.

However, some wavelengths of blue light are better for natural eye focus and can be seen better in terms of focus. One of these is blue-turquoise light. If you take a look at the pic with the article, the reticle, Lucid calls this blue but in reality its a blue-turquoise’ish which just so happens to be in the blue light wavelength that the eye can almost completely naturally focus on and the brain does the rest with its tricks.

yes, I left some stuff out for the sake of brevity, especially the parts where the physics come into play, so some it might seem to be confusing. But in terms of the claim “the human eye is more sensitive to blue light than any other color” – just remember, its not ‘sensitive’ in terms of actual natural vision acuity but rather its ‘sensitive’ in terms of blue light not being filtered by the eyes naturally thus more blue light reaches the retina that that of other colors – but it does not mean vision acuity is actually better with blue light because more of it reaches the retina, or in other words more does not always mean better.

In terms of vision ‘sensitivity’ for eyes vision perception and actual real focus for point sources the best light color is green light.

Red and green just look like an illuminated dot to me. Is the blue supposed to be better? The pic makes it look like a white light to me.

Odd, I could have sworn green was the human eye’s most sensitive color, and by a fairly wide margin.

Blue light to my eyes is kinda blurry, indistinct. I’ll have to play with one of these to find out…

😁

Yeah, I looked at this Lucid optic too. Its pretty much as you say, although, the pic you have with the reticle – for those who wonder, the reticle looks a lot nicer than what that pic shows.