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The other issue with lenses implants is that it's hard to give them adaptive focus; you both need a nice flexible material and attachment points for eye muscles
by azernik 11y ago
The other issue with lenses implants is that it's hard to give them adaptive focus; you both need a nice flexible material and attachment points for eye muscles. It's doable, just currently quite expensive and not quite at the performance levels of the original product.
- J-dawg 11y agoI could be wrong, but I think the implants used to correct myopia are normally fixed-focus, and sit in front of the eye's natural lens rather then replacing it, so you don't lose the natural ability to focus close up (accommodation). However you're right, there are now accommodating lens implants which could correct myopia and presbyopia simultaneously, or be used for people who've had their lens removed due to cataracts. It will be pretty exciting to see how they develop. http://www.londoneyehospital.com/treatments-services/synchrony-accommodating-lens/ http://www.londoneyehospital.com/treatments-services/synchro...
- azernik 11y agoYou're correct about the ones that correct myopia, but there are eye problems that make the lens a total loss - most prominently, cataracts. In these cases the current approach is a lens replacement: the old lens is completely burned out by laser and a new one implanted in its place. It's actually a really cool laproscopic procedure - the lens is flexible and is inserted rolled up, unfurls on its own, and then has its position adjusted by the surgeon. In my dad's case, because an accommodating implant was still impractical, he ended up with one eye permanently focused at infinity and one focused about about 4-5 feet. Which works surprisingly well, because the brain is really good at image processing, but still.