"The glasses have oil-filled lenses which, when adjusted with the attached syringes, allow anyone to dial in their own prescription just by looking at a chart.
"They require very little training to dispense, can be dispensed by an organisation's volunteers in the field, they only need to be delivered once and can make a difference for years afterwards, and are inherently safer (and less valuable on the black market) than items such as prescription medications." -Owen Reading of the Centre for Vision in the Developing World
...The current version of the Adspecs still cost nearly $20 a pop to produce—a bargain considering they come with a self-administered eye exam built right in, but not as close to the $1-a-pair goal set by the project's founder and director, Josh Silver." Gizmodo