Research has already shown that markers of many of the
most common
and devastating diseases,such
as cancer
and
Parkinson's disease,are found in tears.Work is already under
way to validate the use of such markers for diagnosing (
Alzheimer's disease.And recently,a technology named TearExo
has been developed for breast cancer screening using tears col-
lected by patients themselves.That could greatly reduce the
costs of testing and allow earlier detection of malignancy(恶性肿
than X-ray can provide.
But the potential advantages of tears as indicators of health
go beyond occasional testing.One promising tear-based technolo-
gy is a smart contact lens that continuously monitors a patient's
biomarkers,significantly improving disease prevention and early