Contact lenses that dispense prescription drugs

ng an extended-wear lens that would leave its wearer less vulnerable to bacterial infections a chief drawback of such lenses today.

Other researchers have tried getting drugs into contact lenses, either by soaking the lenses in a drug solution or trapping the drug in a hollow cavity between two pieces of lens material. "But contact lenses soaked in drug solutions are not very effective at delivering medications for extended periods of time," Chauhan said. "Our approach allows us great flexibility in designing controlled drug delivery vehicles that can be tailored to different drugs, but are also effective for extended periods of time."

The lenses are in the very early engineering design stages and have not been tested clinically. "We're in the very preliminary stages of developing this technology right now," Chauhan says. No in vitro or animal testing has yet been done.



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