Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Contact lenses inside the eyes

03.01.2003


INASMET Foundation, a member of the TECNALIA Corporation from the Basque Country, is currently carrying out research on intraocular lenses. In fact, INASMET presented two projects at the 17th European Congress on Biomaterials held in Barcelona. Apart from publishing the results of a comparative study on intraocular lenses, they presented a project, currently under development, on intracorneal lenses.



This project started three years ago in collaboration with the Hospital de Donostia, the Department of Organic Chemistry of the University of the Basque Country and the Biomaterials Department at Inasmet.

Intracorneal lenses


As its name suggests, intracorneal lenses are implanted into the cornea. The cornea is the first of the lenses of which the eye is made up, and the most external. The function of these lenses is to correct problems such as myopia, hypermetropia and astigmatism.

The surgical technique in implanting these lenses is very straightforward. Apart from the fact that the operation has to be reversible, using suitable material to make the lenses is fundamental. Inasmet’s involvement in this project specifically targets analysis of materials for the manufacture of the lenses. The main aim is directed at the design, the properties and the production of a material compatible with the cornea.

Biocompatibility

To achieve biocompatibility, biomaterials are used. Biomaterials are materials capable of fulfilling the functions of the tissues and, thus, enabling the creation of organs or part thereof. In this current research, INASMET is analysing a material called PHEMA.

PHEMA is an hydrogel. Hydrogels have the following properties: net structure, elasticity, permeability, water absorption characteristics, etc. Given these properties, it is the habitual material used in lenses today. But when we are dealing with intracorneal lenses, things become complicated, given that the cornea has very special characteristics.

Active material

In order to be compatible with the features of a cornea, using biomaterials is not always enough. This is why, to ensure better biocompatibility, active materials are used.

The biomaterial being investigated at INASMET has a synthetic composition amongst its components. The enzymes secreted by the body in immunological response adhere to this composition and, given that the union is irreversible, these enzymes are inhibited. In this way, the body’s immune response can be halted or weakened. This fact is very important so that the material does not disintegrate, given that the lens has to last for years inside the eye. This technique is known as materials functionalisation and we say that the material is active.

All the research carried out to date has illustrated the potential of the material, but many trials are still to be done before intracorneal lenses are put on to the market. Amongst others, trials have to be carried out to achieve lenses of different dioptres, to perfect the surgical technique involved and the final trials to determine the exact composition of the material.

The project has nevertheless brought together research fields as far apart and, at the same time, as close to each other, as chemistry, materials science and medicine.

Garazi Andonegi | Elhuyar
Further information:
http://www.basqueresearch.com

More articles from Health and Medicine:

nachricht Second cause of hidden hearing loss identified
20.02.2017 | Michigan Medicine - University of Michigan

nachricht Prospect for more effective treatment of nerve pain
20.02.2017 | Universität Zürich

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

NASA's fermi finds possible dark matter ties in andromeda galaxy

22.02.2017 | Physics and Astronomy

Wintering ducks connect isolated wetlands by dispersing plant seeds

22.02.2017 | Life Sciences

Impacts of mass coral die-off on Indian Ocean reefs revealed

21.02.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>