We also collect used glasses. We have a collection site at Market Street, 6100 W. Eldorado Parkway. The collection box is an old US Post Office Mail Box painted bright yellow located in the East entrance. There are also collection boxes at various retailers around McKinney. The glasses we collect are taken to our District Collection site where they are cleaned, sorted by prescription and stored to be sent with volunteer optometrists to foreign countries where they are fitted to patients.