Posted in | News | Pressure Sensor

Implanted Pressure Sensor to Monitor Glaucoma

Researchers at the University of Michigan have developed two sensing devices.

UMich's Eye Pressure Monitor

The first is a tiny pressure monitor that can be implanted into the eye of the patients suffering from glaucoma. The second is a minute radio that needs no fine tuning and can be connected to a network that could detect pollution, control building strength and  security systems.

Dennis Sylvester and David Blaauw have designed the pressure sensor that constantly monitors the progress of glaucoma. It measures 1 cubic millimeter and fits a low-power microprocessor with memory, a thin-film battery, a solar cell and a wireless radio. The radio antenna relays information to an external control monitor near the eye. The processor deploys power gating and a power efficient sleep mode. It records data every 15 minutes, consumes 5.3 nanowatts of power, while the battery needs to be exposed to sunlight for an hour and a half for recharging. It stores three weeks of information.

Wentzloff and Kuo-Ken Huang have designed a radio with an on-chip antenna. The crystal reference chooses a radio frequency band. Removing this crystal reduces the radio size. It will also track time. The CMOS technology helps control the way it oscillates to electrical signals.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.