1.591PC Single Vision Polycarbonate Lens

Thinkey Optical's 1.591 PC polycarbonate single vision lens combines high impact resistance with a lightweight, comfortable fit — 10 times stronger against impact than standard plastic lenses and 60 times stronger than mineral lenses. An anti-scratch coating keeps the lens surface clear through daily wear. This lens is available in the following options:

Clear
The standard Clear option delivers reliable vision correction for everyday use, combining optical clarity with polycarbonate's impact-resistant strength.

Photo Grey / Brown
This option uses photochromic technology that automatically adjusts from clear indoors to grey or brown outdoors when exposed to sunlight, reducing glare and eye strain as light conditions change. The grey tint preserves true color perception, while brown enhances contrast — well suited to driving, outdoor activities, and daily wear.

Photo Grey / Brown Blue Cut UV420
This option combines the same photochromic response with blue light filtering up to 420nm, offering all-day protection for users who move between screens and sunlight. It darkens to grey or brown outdoors while blocking blue light indoors, helping ease digital eye strain alongside the lens's impact-resistant, durable build.

Abbe number (33.0)