What to do with

Spectacles

You cannot put old spectacles or glasses in your household recycling bin; however, you can donate them to charity.

Ask your optician if they collect old spectacles. Many do - they are donated to charities who send them to developing countries.
Vision Aid Overseas can help you find an optician in your area who collect old spectacles.
Some charities such as Marie Curie will accept unwanted spectacles at their shops.