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Do Blue light Filter Glasses Really Work?

Possible major hazard for blue light 

What exactly is blue light? 

What Are Blue Light Blocking Glasses And Do They really Work?

How do Blue light filter glasses works

Continue ReadingDo Blue light Filter Glasses Really Work?

Computer glasses blue light protective is really matter?

What is blue light?

Blue light is a short-wave high-energy light having a wavelength between 400 nm and 480 nm.

The blue light in this wavelength will increase the amount of toxin in the macular area of the eye, which seriously threatens the health of our fundus.

Blu-ray-induced blind eye disease, the current effective solution is to film screens or lenses.

The anti-blue film technology is very mature and low in cost, which can effectively prevent blue light from penetrating.

Not all blue lights are harmful, what is really harmful is blue light having a wavelength within 400 to 440.
Actually, blue light between 480 and 500 nanometers has a function of adjusting biological rhythm, sleep, mood, memory, etc

Continue ReadingComputer glasses blue light protective is really matter?

NO LINE BIFOCALS LENS (PROGRESSIVE MULTIFOCAL LENS) IS A LENS THAT

Upper part is used to look far
The middle is used for medium distance
The bottom is used to look at the near

Continue ReadingWhat is no line bifocals lens?

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