Implant Measures Eye Pressure
At the upcoming meeting of Engineering in Medicine and Biology, Purdue University researchers plan to present a new device they’ve developed that provides continuous monitoring of intraocular pressure. The tool was described in the Technology Review.
The small, wireless microchip is designed for implantation between layers of the eye. The sensor runs using nanowatts of energy, rather than microwatts. This design overcomes previous issues with development of such a device; power needs have hindered previous efforts.
The device has an embedded wireless capability and monitoring is transmitted to a computer. This information is then sent to clinicians for ongoing review. The tool will help clinicians identify such changes to mitigate potential damage to the optic nerve.
At this point, the Purdue team has developed a prototype. They are planning to complete animal studies, slated to start before the end of the year. There are other teams around the world developing tools for a similar intent. One such is being developed by a Swiss team, who have developed a monitoring tool in soft contact lenses.
Damage occurs secondary to canals used to drain intraocular fluid (aqueous humor); these canals frequently become clogged in people with diabetes. This results in pressure increases in the eye which can damage the optic nerve. The advantage of the tool is that early identification of pressure changes allow commencement of treatment before vision loss.
Related story: Early Detection of Glaucoma
August 16, 2007 Related topics: Diagnostic, Ophthalmology