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    Wireless-Powered ASIC
    for Smart Glaucoma
    Contact Lens

Glaucoma is a leading cause of blindness — and its earliest warning sign is rising intraocular pressure (IOP). But traditional IOP checks only happen in clinics, often missing fluctuations that occur throughout the day.

Sensimed has change that with the SENSIMED Triggerfish®: a smart, single-use contact lens that continuously monitors IOP by tracking corneal curvature changes. The lens includes embedded strain gauges — but no battery. It needs to operate wirelessly, using harvested power from a magnetic field around the eye.

At the core of connected industry

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Smart metering (gas/water/electricity)

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Smart metering (gas/water/electricity)

Secure, low-power communication for real-time utility monitoring

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Time-of-flight
for robotics

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Time-of-flight
for robotics

Precision sensing for navigation and obstacle detection in automation

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Lighting, building automation, and HVAC

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Lighting, building automation, and HVAC

Fire detection, CCTV/video surveillance cameras, intruder alarm, thermostats & controls

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NFC and RFID systems

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NFC and RFID systems

Seamless smart infrastructure integration with telecom expertise

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Encoders for robotics

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Encoders for robotics

High-precision motion control for automation and industrial robotic applications

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Test equipment

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Test equipment

Automated test equipment for semiconductors, digital multimeters, network analyzers, digital oscilloscopes

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Factory automation & control

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Factory automation & control

Flow, level, pressure, and temperature measurement

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Motor drives

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Motor drives

AC variable speed drives, DC drives, servo drives, stepper drives, soft starters/brakes

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Power & energy

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Power & energy

AC/DC supplies, converters, inverters, battery chargers, UPS, generators, and renewable energy (hydro/solar/wind)

Success in action

How we’ve helped leaders in Industry 4.0 and robotics

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LED driver array for industrial printers

Designed an advanced LED driver array using TSMC 0.18µm technology, enhancing industrial printing with precise current control and on-chip diagnostics.

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Laser distance measurement system for Industry 4.0

Developed a System-on-Chip (SoC) for laser distance measurement with precise laser driver pulse steering and a Transimpedance Amplifier (TIA) photodiode front end, achieving accurate distance measurements for automation and manufacturing.

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High precision GPS receiver

Designed a high-precision GPS receiver using TSMC 65nm technology, ensuring accurate location tracking even in challenging environments, enabling applications like surveying and asset tracking.

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Smart metering with acoustic front end

Developed an ultra-sound transceiver using TSMC 0.18µm CMOS technology for accurate flow metering and acoustic sensing, enabling precise water, heat, and electricity usage measurement in smart meters.

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High-performance EPC Gen2 RFID UHF reader

Developed a highly integrated RFID reader IC suitable for fixed and mobile applications. The complete UHF radio transceiver is integrated on-chip, including the digital modem and an ARM Cortex M0+ core. The design features a low-noise, high-linearity optimized receiver to support backscattering communication, ensuring reliable performance in diverse environments.

From design to silicon:
full-spectrum semiconductor expertise

Custom semiconductor design and turnkey ASIC solutions, built for Industry 4.0 and robotics

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The requirements

The chip must function entirely on harvested energy, with zero room for heat, bulk, or error. Key requirements include:

  • Power and signal processing fully integrated on CMOS
  • Operation within 2.1–5 V, drawing just 1–3.5 mA
  • Wireless data link via 13.56 MHz magnetic field using load modulation/backscattering
  • High-resolution sensing through a resistive Wheatstone bridge
  • Minimal heat rise (<1 °C) and millimeter range die footprint
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Bringing the solution to life

Cyient Semiconductors delivers a fully custom ASIC built on ON Semiconductor’s 0.35 μm I3T50 HV process — integrating power management, analog front-end, ADC, and wireless communication into a single, compact die.

Key features:
  • 17-bit ADC for low-noise, high-resolution pressure sensing
  • Temperature compensation circuitry to maintain signal stability
  • Power conditioning without Schottky diodes for minimal energy loss
  • Load-modulated magnetic feedback for wireless data transmission
  • Direct die attachment to copper lens traces — no external components required
The entire system has been development for ultra-low power and medical-grade reliability, enabling seamless integration into the lens itself.

Where it’s used today

 The chip powers the Triggerfish® smart contact lens — helping ophthalmologists track IOP continuously and remotely, giving them insights they previously couldn’t access.

It proves the viability of fully wireless, battery-free medical implants — and pave the way for new forms of smart, wearable diagnostics in healthcare.

Need specialized silicon for
industrial automation? 

Talk to our experts