You might feel good sending about your old reading glasses to a developing country. But it would actually be more beneficial to give $10 towards providing new spectacles when you buy your new glasses, according to an international study led by Sydney scientists.
The study found that only 7% of a test sample of 275 recycled glasses were useable, and that this helped push the delivery cost to more than $US20. Ready-made glasses can be supplied for half that cost.
