Optic Nerve FixiePhenom 2 review The Optic Nerve FixiePhenom 2.0 delivers premium full-frame performance — interchangeable & photochromic lens options at a price that undercuts the big names. Full review. Optic Nerve - opticnerve.com/products/fixiephenom-2-0-photochromic In this review we break down the Optic Nerve FixiePhenom 2.0 — the second generation of the brand's do-it-all performance sunglasses. Built on a full-frame, soft-touch platform, the 2.0 adds upgraded interchangeable lens options for all-condition vision, with a wide field of view and rock-solid stability that stays put whether you're riding, running, or hiking. The photochromic version is the standout: UV-reactive lenses automatically darken and lighten as light shifts — dawn rides into midday sun, open meadows into deep timber — while maintaining 100% UVA/UVB protection at every tint level. No lens swaps, less eye fatigue. And at $99 ($149 photochromic) with a product lifetime warranty from an independe...