Contact
lens sensors provide a noninvasive approach for
intraocular
pressure (IOP) monitoring in patients with glaucoma. Accurate measurement
of this imperceptible pressure variation requires highly sensitive
sensors in the absence of simultaneously amplifying IOP signal and
blinking-induced noise. However, current noise-reduction methods rely
on external filter circuits, which thicken contact lenses and reduce
signal quality. Here, we introduce a contact lens strain sensor with
an anti-jamming ability by utilizing a self-lubricating layer to reduce
the coefficient of friction (COF) to remove the interference from
the tangential force. The sensor achieves exceptionally high sensitivity
due to the strain concentration layout and the confined occurrence
of sympatric microcracks. The animal tests prove our lens can accurately
detect IOP safely and reliably.
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