Holographic Contact Lenses

JohnFP · Post by **JohnFP** » Tue Aug 08, 2006 11:30 am

I caught the tail end of a technical show on TV (I do not know which one) in which they were talking about holographic contact lenses and blood glucose. Here is the abstract that I found.

http://www.liebertonline.com/doi/abs/10 ... .2006.8.89

I also found this in searching for holographic contact lenses.

http://www.freepatentsonline.com/7048378.html

Ed Wesly · Post by **Ed Wesly** » Tue Aug 08, 2006 2:14 pm

These are two wacky sites! The first one sounds like the stuff Jeff B. is working on, holographic sensors that change color in certain environments. Something must be going on in the cornea that lets the glucose level be monitored there and not with blood. I wish I had the time to backtrack through the papers. Later...

Sounds like the other one puts a diffraction grating on the contact lens to put a glint in the eye?! What about when looking through it? Will this be the next big fashion? Or just a special effect.

It's funny neither one has to deal with the use of a zone plate on a contact lens to make a bifocal contact lens. This was the topic Jem brought up in this thread:

http://holographyforum.org/phpBB2/viewt ... ntact+lens

It will be interesting to see if any of these items ever make it to market!

nemo · Post by **nemo** » Mon Aug 21, 2006 8:36 pm

Ed Wesly wrote: The first one sounds like the stuff Jeff B. is working on, holographic sensors that change color in certain environments. Something must be going on in the cornea that lets the glucose level be monitored there and not with blood.
market!

The density of sugar in water can be measured with polarized light. Sugar

in water causes the light's polarization to twist. The amount of sugar in the gell in the eye might be an indicator of the amount of sugar in the blood. I wonder if they are measuring it that way.

Martin · Post by **Martin** » Tue Aug 22, 2006 11:37 am

nemo wrote:
Ed Wesly wrote: The first one sounds like the stuff Jeff B. is working on, holographic sensors that change color in certain environments. Something must be going on in the cornea that lets the glucose level be monitored there and not with blood.
market!
The density of sugar in water can be measured with polarized light. Sugar
in water causes the light's polarization to twist. The amount of sugar in the gell in the eye might be an indicator of the amount of sugar in the blood. I wonder if they are measuring it that way.

According to WO 2005/015184 it's based on a wavelength shift of a reflection hologram - very much like the SMART Holograms would. The matrix may contain phenyl boronic acid which is said to react with glucose, inducing the polymer matrix to contract.