How to distinguish the pros and cons of photochromic lenses

Since the added silver halide has been integrated with the optical material, the color-changing lens can change color repeatedly. Long-term use can not only protect the eyes from strong light stimulation, but also correct vision.

The color changing mirror automatically changes the color according to the change of sunlight intensity to protect eyesight, improve aesthetics, and reduce the irritation and damage of sunlight and ultraviolet rays to the eyes. When choosing a color-changing lens, in addition to choosing the right color, you must also choose high-quality lenses. There are many low-quality glasses on the market. The visual image is distorted and distorted, consumes eyesight, fatigues the eyes, and induces various eye diseases.

Then how do we distinguish the pros and cons of color-changing lenses?

1. Lens surface: high-quality color-changing glasses lens surface, without the slightest scratch, abrasion, rough surface, pitting, obliquely obliquely facing the light, the smoothness is extremely high, there are no spots, stones, streaks, bubbles, and cracks inside the lens , Translucent and bright.

2. The discoloration must be uniform: the two lenses of the color-changing glasses must be the same color without different lenses, and cannot show several colors. There is no "yin and yang", and the discoloration time is fast when it sees sunlight. When there is no sunlight, the color fade time is also fast; inferior quality The lens discoloration is slow and fast fading, or discoloration is fast and fading is slow. The worst color changing glasses do not change color at all.

3. Lens thickness: The thickness of the two lenses of the color-changing lens should be the same, not one thick and the other thin, otherwise it will affect vision and damage the health of the eyes. The thickness of the single lens should be uniform. If it is a color-changing flat lens, the thickness should be about 2mm. Smooth edges.

4. Wearing comfort: No feeling when wearing, no dizziness or swelling, observing objects are not blurred or deformed, when buying, hold glasses in hand, see through the lens with one eye, see distant objects, shake the lens up and down, left and right, distant objects The illusion of movement should not occur.

5. Protective: High-quality color-changing glasses can block UVA and UVB 100%, providing the most effective UV protection for wearers.