"It’s a weapon that fights malaria – a laser scan can give an accurate diagnosis in seconds, without breaking the skin, just like the fictional tricorder in Star Trek.
“It works by pulsing energy into a vein in a person’s wrist or earlobe. The laser’s wavelength doesn’t harm human tissue, but is absorbed by hemozoin – waste crystals that are produced by the malaria parasite Plasmodium falciparum when it feeds on blood.”
“Laser ‘tricorder’ can diagnose malaria through the skin”