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March 31, 2005

BehindTheMedspeak: Medicated Contact Lenses


Dr. Edwin Chow of the Institute of Bioengineering and Nanotechnology in Singapore invented the lenses.

Using a well-established nanotechnology fabrication method for creating small channels, he is the first to have succeeded in transporting drugs successfully to the eye through contact lenses.

Why is this a huge advance?

For one, when someone applies an eye drop, about 95% of the solution is washed away with tears, even if the drop has been successfully applied, no small feat.

Some of the medicine then drains into the nasal cavity, where it can enter the bloodstream and potentially cause side effects.

The new lenses solve these problems in a straightforward way.

First, drugs to be administered are added to the solution from which the lens is to be molded.

The mixture of molecules, after it hardens and sets, contains a network of tiny channels 100,000 times smaller than the width of a human hair.

These channels act as conduits for the drug(s) to be released when the lens comes in contact with eye fluid.

By adjusting the channel size, medicine can be administered over the course of hours or days.

[via the Economist]

March 31, 2005 at 03:01 PM | Permalink


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As a pharmacy student i feel its a great thing as its difficult to deal with eye treatment. I want to know more about this research can i get the article or preview of this project? U can send that on my e-mail id bhat.jyotsna@yahoo.com

Posted by: Jyotsna s. Bhat | Jan 8, 2009 12:38:32 PM

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