An anti-fog treatment contains hydrophilic ingredients, that is, “water-loving”. They want to absorb water and spread it evenly over a coated surface. It keeps water droplets from becoming big enough to be visible, or, in other words, big enough to be visible, or, in other words, big enough to be seen as fog. I know, this is exactly opposite what you’ve learned for the hydrophobic surfaces of premium AR lenses and the way that they’ve been described as easy cleaning. But it’s possible to have both.
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