They say prescription glasses should be changed every year or every other year… but mine is now is three years old. Aside from the fact that my eye glasses is still good, it has a sentimental value. My beloved Mom ( who passed away 2 yrs. ago) was the one who bought me my eyeglasses. I supposed to settle for the cheap one but she insisted to buy the branded frame and scratch-free imported lens. Every time I remember my mom’s act of kindness and love, I couldn’t help but miss her.