Astronomy Laser Glass Art
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Astronomy Laser Gift Bag Astronomy Laser Function Pen Astronomy Laser Full Color Astronomy Laser For Steel Astronomy Laser Focusing Lens
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Notice that visible and near infrared light are focused onto the retina by the eye's lens. This makes the eye much more sensitive to injury from light in this wavelength range (400 nm ? 1400 nm) because the focusing by the lens increases the power density in the laser beam.
The damage mechanisms are similar no matter where the light is absorbed. The basic types of damage are thermal burns, photochemical reactions, and acoustic shock. The last mechanism, acoustic shock, is caused by high-intensity short-pulse lasers when the laser light causes a sudden vaporization of tissue which then causes a shock wave to spread, tearing other tissues in the eye. Photochemical reactions either cause cloudiness in eye tissues or a loss of light sensitivity.
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