Yes, you can combine a discount code with the 2 for 1 offer. So you can order with the 2 for 1 offer and also use, for example, the discount code you got for writing a review – and get both benefits.
Enter the discount code in the "Discount code" field at checkout.
If the code doesn't work at checkout, check:
- that the code is still valid (the terms are in the message in which you received the code)
- that your cart reaches the code's minimum order amount, if it has one
- that your cart contains both frames and lenses (a condition of the 2 for 1 offer)