Tools called lithophanes are physical images adorned with shallow engravings. Today, scientists are using them to overcome visual disabilities.
One of Shaw’s students had been tinkering with engraving graphics into 3D-printed slabs. To save on material and time, they started making those slabs thinner and thinner. When they held the slimmest up to the light, the engraved graphs popped out to them just as starkly as it had in the original image.
Both groups could answer the questions with an average accuracy of over 90 percent: comparable to the 88 percent average of sighted people viewing the original digital image. Moreover, when researchers made sighted subjects wear blindfolds and answer questions via touch alone, they could answer questions with an impressive 79 percent accuracy.
“A lot of times, we think about making things accessible to blind students,” says Minkara. “But this technology could be really useful for me, as a blind professor, to be able to communicate with my students…and share data.”
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