gkb optolabs — Defective Lenses

Purchased glasses from optolabs in Kammanahalli Main Road, Bangalore about 18 months back. The branded frame sferoflex about 3 months back developed discoloration. When I went to store, they looked in database and told warranty period of one year is over. Never I had this issue with other frames. It usually lasts easily more than 2 years. I paid over 6K for the glasses and now disappointed that within 1.5 years I need to change.