Cocoons Clip-Ons featuring Twilight Lemon lenses feature the same optical quality lenses found in our patented Cocoons Low Vision fitover UV filters. The scratch resistant, optically correct lenses are mounted in durable, yet lightweight, low profile, monel frames available in an array of shapes and sizes to fit 99% of today’s most popular eyewear styles. The precision FreeFlowstainless steel bridge allows you to quickly and easily attach the clips to your existing eyewear, instantly transforming them into high contrast UV filters that provide enhanced contrast and glare reduction in low light conditions . Cocoons Clip-Ons effectively filter 100% of damaging UVA and UVB ultra-violet light and eliminate blinding glare generated from artificial lighting that can cause unnecessary eyestrain. All Cocoons Clip-Ons feature a limited lifetime warranty and include a protective case.