- #1
tim1608
- 63
- 0
Hi Everyone
I am not sure but I seem to remember that about ten years ago, I either read something or saw something on TV about a revolutionary new type of lens which could potentially replace bifocal and varifocal spectacle lenses. The main drawback of bifocal and varifocal lenses is that you have to look through different parts of the lens to benefit from the different focal lengths. (Basically, you look through the upper part of the lens in order to look into the distance and the lower part in order to read up close.) I think this would be a pain in the neck (quite literally) and I am not sure I could get used to it.
If I remember correctly, the lenses I saw mentioned about ten years ago work like as if two lenses of different focal lengths co-exist in exactly the same place (like a ghost passing through a wall co-exists in exactly the same place as the wall) so that you don't have to look through different parts of the lens to benefit from the different focal lengths. If I remember correctly, they do this by borrowing some aspects of lenticular technology or something similar.
EDIT:
I think the idea is that the lenses present to your eye both the focused image and the blurry image together and your brain learns to filter out the blurry image.
END OF EDIT
EDIT2:
I think what I saw about ten years ago involved concentric interleaving and did not involve lenticular technology directly.
END OF EDIT2
I am now just starting to get to the point with my eyesight whereby reading small text up close is starting to get a bit difficult. I have therefore just searched Google for any mention of the lenses that I think I remember from ten years ago but I have not managed to find anything about them. Does anyone know anything about these lenses? If yes, I would be very grateful if you could point me in the right direction.
Thank you very much.
Kind regards
Tim
I am not sure but I seem to remember that about ten years ago, I either read something or saw something on TV about a revolutionary new type of lens which could potentially replace bifocal and varifocal spectacle lenses. The main drawback of bifocal and varifocal lenses is that you have to look through different parts of the lens to benefit from the different focal lengths. (Basically, you look through the upper part of the lens in order to look into the distance and the lower part in order to read up close.) I think this would be a pain in the neck (quite literally) and I am not sure I could get used to it.
If I remember correctly, the lenses I saw mentioned about ten years ago work like as if two lenses of different focal lengths co-exist in exactly the same place (like a ghost passing through a wall co-exists in exactly the same place as the wall) so that you don't have to look through different parts of the lens to benefit from the different focal lengths. If I remember correctly, they do this by borrowing some aspects of lenticular technology or something similar.
EDIT:
I think the idea is that the lenses present to your eye both the focused image and the blurry image together and your brain learns to filter out the blurry image.
END OF EDIT
EDIT2:
I think what I saw about ten years ago involved concentric interleaving and did not involve lenticular technology directly.
END OF EDIT2
I am now just starting to get to the point with my eyesight whereby reading small text up close is starting to get a bit difficult. I have therefore just searched Google for any mention of the lenses that I think I remember from ten years ago but I have not managed to find anything about them. Does anyone know anything about these lenses? If yes, I would be very grateful if you could point me in the right direction.
Thank you very much.
Kind regards
Tim
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