4 Curious Questions about your Photochromic Lenses
by EO Executive Optical | November 27, 2018 at 11:10am

Photochromic lenses in the Philippines are still on the rise in popularity which is understandable since not only are they basically fashionable sunglasses or eyeglasses (depending on where you wear them), but they also function in more ways than we know. Sure, we know that they are meant to roll over the function of both sunglasses and eyeglasses into one, but do we know everything about them? Here are some questions that you might not have previously thought of.




Can Photochromic Lenses be Plastic?

The most common material for photochromic lenses is glasses but they are also available in polycarbonate as well as plastic. Creating the commercial lenses actually involve embedding the material with Silver One Chloride (AgCl). Here’s a secret; plastic lenses transition faster than glass!


Do Photochromic Lenses Automatically have UV Protection?

Unlike other lenses, photochromic lenses do, in fact, have UV protection built in them which makes buying photochromic lenses in the Philippines a very practical investment to keeping your eyes healthy. The only other material used for lenses that has built in UV protection that blocks out 100% of UV light is polycarbonate.


Can they be Polarized?

Do they sound similar? Well, they are not. Photochromism, as we’ve mentioned before, is how lenses change color in reaction to UV. Polarization, however, is making a material glare-proof. Since polarization is done by applying a coat to the lenses, it is possible to have photochromic lenses that are polarized although this is not a practice normally done.


Are they Non-toxic?

Not exactly. Photochromic lenses are very safe. However, silver chloride (AgCL), the compound mixed with the glass to cause the photochromic reaction, is toxic in its raw form. Raw AgCl is a powder. This powder can prove to be harmful if ingested or via skin contact and can be very harmful and damaging when inhaled. Good thing photochromic lenses in the Philippines are made safely so we get to enjoy the transformative benefits of the compound without endangering ourselves.