The Triggerfish Lens and Glaucoma Monitoring By Samuel

The Triggerfish Lens and Glaucoma Monitoring By Samuel Karnes

Glaucoma • Intraocular pressure on the optic nerve o • Blindness Four types o Chronic (open angle) o Angle Closure (acute) o Congenital o Secondary

Triggerfish Lens • Sensimed AG • Strain gauges o around the outer edge • Micro-processor • Antenna o • Radiofrequency waves Bluetooth

Current Glaucoma Tests • Tonometry Procedures • Eye is numbed with numbing drops • o Slit-lamp is moved forward until tonometer touches the eye o Handheld device touches the eye and takes pressure reading o Pressure is read from change in light reflections when air hits the eye (Air Puff) Each procedure only reads IOP for a few seconds

Advantages • 24 hour IOP monitoring • Silicon hydrogel (used for regular contact lens) o • Easy to wear Non-Invasive

Disadvantages • Not available in U. S. currently • Each lens only provides a single use • Common adverse effects o Eye irritation o Blurred vision

Testing Results • Effective results for 36 of 40 patients • 82% blurred vision • 80% inflammation and reddening of the eye o Symptoms usually went away within 24 hours

Conclusion • Lens collects more data than current tests o • Seconds of monitoring vs. hours Long term o More accurate diagnoses o Better information for finding a possible cure

Questions?

Refrences • • • [1] Gravitz, Lauren. "Mobile Computing Is Just Getting Started. " MIT Technology Review. MIT, 31 Mar. 2010. Web. <http: //www. technologyreview. com/news/418247/glaucoma-test-in-a-contact-lens/>. [2] Haughton, Alison N. "Tonometry. " Health Facts. Ebsco, n. d. Web. <http: //www. beliefnet. com/healthandhealing/getcontent. aspx? cid=100915>. [3] "Sensimed Triggerfish. " Sensimed Triggerfish | Sensimed AG, 2013. Web. <http: //www. sensimed. ch/en/products/sensimed-triggerfishr. html>. [4] "Contact Lens Measures Intraocular Pressure. " Contact Lens Headlines RSS. Access Media Group LLC, 11 Feb. 2011. Web. <http: //www. contactlensheadlines. com/6447/triggerfish/>. [5] Gever, John. "Contact Lens Promising in Glaucoma. " Contact Lens Promising in Glaucoma. Med. Page Today, 13 Aug. 2012. Web. <http: //www. medpagetoday. com/Ophthalmology/Glaucoma/34180>. [6] "Glaucoma. " Glaucoma. U. S. National Library of Medicine, 14 Sept. 2011. Web. <http: //www. ncbi. nlm. nih. gov/pubmedhealth/PMH 0002587/>.