UP2 1.55S PH, AC1.55PH

These are lenses that change automatically color in accordance with the amount of ultraviolet rays in the air and the density also changes so glare caused by visible light is reduced. This improves the quality of vision.
These lenses have an excellent variable light function so the speed of coloring and fading is even faster.
Therefore the density of the lenses changes quickly.
It is possible to cover all situations, from indoors to outdoors, with one pair of glasses and to protect your eyes from glare. These lenses are made from a thin material with a refractive index of 1.55.
These lenses are available in the two popular colors of brown and gray.

Thinness / coating

Product Name Thinness UV Cut off Reflection Resistance Contamination Resistance Scratch Resistance Anti-static coating Reducing blue light Blocking UV rays reflected from the back Fogging Resistance
UP2 1.55S PH
<gray / brown>
★★ 標準 標準 - - - - - -

S:Standard specifications OP:Option


Product Name Refractive Index Specific Gravity Abbe Value Quality Assurance Mark
UP2 1.55S PH
<gray / brown>
1.55 1.19 40 -


  • Use of photochromic lenses (lens color of which darkens when exposed to UV rays) in dark place such as tunnels is dangerous. The lens color takes time to return to its clear state in tunnels or dark parking lots, or at sunset, for example, and this can be extremely dangerous since it may result in degraded vision. Use of the lens should be avoided in such places or at such times.
  • Changes in density and color changes differ depending on conditions such as the temperature, weather and UV-ray intensity.
  • Due to the properties of photochromic lenses, the lens performance changes with time.
  • Orders for single lenses or with additional tints cannot be accepted.