Wednesday, April 16, 2008

Sensimed Technology: Noninvasive Intraocular Pressure Monitoring with a Contact Lens

Filed under: Ophthalmology

Red Herring 100 awards for the best startups in Europe in 2008 have been announced. Only two (!) companies in biomed categories have been recognized by Red Herring: Israel-based Foamix and a Swiss company Sensimed AG, a firm trying to commercialize a noninvasive intraocular pressure monitor with a sensing contact lens.

Here's how the company outlines its technology:

We propose a novel approach to intraocular pressure (IOP) measurement allowing 24-hour continuous IOP monitoring, regardless of patient position and activities. The key element of this innovative measurement method is a soft disposable contact lens with a MEMS sensor embedded - the CLS - allowing the measurement of the cornea deformation due to IOP changes. As the system is placed in the same way as a corrective contact lens, no anaesthesia is required and patient vision remain almost unimpaired. A telemetry microprocessor and an antenna are also embedded into the CLS for wireless power and data transfer.

CLS System

The CLS System comprises a pair of glasses (or patch for overnight measurements) and a pocket unit - the CLS Reader. Thru the glasses energy is sent to the CLS and data are retrieved wirelessly and stored in the pocket unit to be worn by the patient elsewhere.

The company has been around since at least 2004, so we are not really sure what was the reason for Red Herring to select it now. On the other hand, the company had almost a €4.8 million venture capital infusion in January, so things are not as static as they might appear to be.

Sensimed AG...

email this article to a friend      print this!           comments and peer reviews (2)






replies: 2 comments
Open comments are not moderated, although abusive and vulgar remarks may be deleted. Opinions expressed do not necessarily reflect the views of Medgadget.com. Please consult our disclaimer.

How accurate is the CLS reading. I have been wearing lenses since a long time and it seems a very good technology for people like me but I'm skeptic about its accuracy.


Posted by: navtej kohli
on April 16, 2008 02:29 AM GMT

I wish Sensimed the best of luck. We have tried several times to use a MEMS system with a contact lens design but could never get consistent results. If we were looking for 10 or 20 mmHg swings in groups of patients with the exact same keratometry and pachymetry measurements, that would be great. However, varibility in tear films, eyelid effects and corneal rigidity in a heterogeneous patient population forced us to seek better technology.

We have moved on.

Dan Stingl, MD JOA


Posted by: Dan Stingl, M.D.
on May 21, 2008 02:45 PM GMT

add a comment
html tags: <b>, <i>, and <a>
examples: <b>Bold</b> <i>Italic</i>









Remember personal info?
(anonymous comments allowed)



click to make your selection boldclick to make your selection italicclick to add a link


Verification (needed to reduce spam):




Click the "Post" button only once!