Quoted:
Everytime people find another photovoltaic material, the material is only a few hundred microns thick, thinner than a contact lens, and the media always talk about making human night vision contact lenses.

Meanwhile, no one ever mentions that GaAs is only a few hundred microns thick, thinner than a contact lens, and does the job admirably.

The problem with trying to make a contact lens out of anything, is that none of these materials can re-emit a photon on the same vector as the incident one that they absorbed, so they lose that information, and in doing so, cannot be "inline" within any light.

This means that all the lenses have to be re-installed to focus the light correctly, which means that they can make contact lenses, but the are still going to be three inches thick to accommodate all the glass necessary to correct the light paths. About the same as current technology. That's not something I want stuck to my eye anytime in the near future. The closest near-technology they could manage without those lenses would be to place something on the retina to stimulate the nerves directly based on out-of-band light ( after they replace the cornea and lens to allow the light to focus correctly ). Again not so great :(

The biggest true advantage of new materials isn't the concept of creating contact lenses or even lightweight glasses - it's the ability of the devices to improve efficiencies, or be sensitive to wavelengths other than what the current technology can manage, or to massively reduce the cost of production.

Regards
David

Quoted:
Don't worry about it. From where he comes from water swirls the opposite direction so what do you think happens to the light.

Quoted:
Everytime people find another photovoltaic material, the material is only a few hundred microns thick, thinner than a contact lens, and the media always talk about making human night vision contact lenses.

Meanwhile, no one ever mentions that GaAs is only a few hundred microns thick, thinner than a contact lens, and does the job admirably.

The problem with trying to make a contact lens out of anything, is that none of these materials can re-emit a photon on the same vector as the incident one that they absorbed, so they lose that information, and in doing so, cannot be "inline" within any light.

This means that all the lenses have to be re-installed to focus the light correctly, which means that they can make contact lenses, but the are still going to be three inches thick to accommodate all the glass necessary to correct the light paths. About the same as current technology. That's not something I want stuck to my eye anytime in the near future. The closest near-technology they could manage without those lenses would be to place something on the retina to stimulate the nerves directly based on out-of-band light ( after they replace the cornea and lens to allow the light to focus correctly ). Again not so great :(

The biggest true advantage of new materials isn't the concept of creating contact lenses or even lightweight glasses - it's the ability of the devices to improve efficiencies, or be sensitive to wavelengths other than what the current technology can manage, or to massively reduce the cost of production.

Regards
David