Polyacrylate-based light adjustable optical element

An optical element comprising:

• i) A first polymer matrix;
• ii) A modifying composition capable of stimulus induced polymerization said modifying composition being the general formula:
• 2 X ⁢ — ⁡ ( A ) m ⁢ — ⁢ Q ⁢ — ⁡ ( A ) m ⁢ — ⁢ X 1 or X ⁢ — ⁡ ( A ) n ⁢ — ⁡ ( A 1 ) m ⁢ — ⁢ Q ⁢ — ⁡ ( A ) m ⁢ — ⁡ ( A 1 ) n ⁢ — ⁢ X 1
• where Q is an acrylate-based multifunctional initiator useful in Atom Transfer Radical polymerization;
• A and A1 are the same or different and have the general structure
• 7
• wherein R is selected from the group consisting of alkyls, halogenerated, alkyls, aryls and halogenerated aryls and R5 is selected from the group consisting of hydrogen, alkyls, aryls, halogenerated aryls, M and N are intergers and X and X1 are the same or different and contains a moiety capable of stimulus induced polymerization.