What are the hazards of ultraviolet laser？

The wavelength range of ultraviolet laser is usually between 190 nanometers and 400 nanometers. This wavelength range is shorter than the wavelength of visible light. For example, the shortest wavelength of violet light in visible light is about 400-450 nanometers, while the wavelength of ultraviolet laser is shorter.

Damage of ultraviolet laser 

1. Corneal damage

The high energy of ultraviolet laser can be directly absorbed by the cornea. When the cornea absorbs excessive UV laser energy, it will cause damage to corneal epithelial cells. This may cause corneal inflammation, eye pain, photophobia, tearing, and decreased vision.

2. Lens damage

Long-term exposure to low-intensity UV lasers or short-term exposure to strong UV lasers may cause lens opacity. The normal structure and transparency of the lens are essential for the focusing function of the eye. Once opacity occurs, cataracts may occur.

3. Retinal damage

Although the main energy absorption site of UV lasers is not in the retina, some UV lasers can penetrate the anterior structure of the eyeball to reach the retina. The photoreceptors and nerve cells on the retina are very sensitive. After being damaged by UV lasers, retinal hemorrhage and edema will occur, leading to permanent loss of vision. Especially for UV lasers with shorter wavelengths, their photon energy is higher and the potential harm to the retina is greater.

UV lasers are so harmful to human eyes that we must protect our glasses well. The most important thing is to wear UV laser protective glasses.

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① LP- GHP  UV Laser Safety Glasses

Optical Density: 180 - 540nm OD 5+

LB-Rating:  315 - 540nm DIRM LB5

Transmittance: 40% 

LP-GHP-2  UV Laser Safety Glasses

Optical Density: 180 - 534nm OD 7+

LB-Rating:  315 - 534nm DIRM LB6

Transmittance: 25%