Yah. Just because you can't see doesn't mean it isnt' there. I hope the dyes are nontoxic.
The method you describe is undoubtedly what is being done. I have another example from the world of biochemistry. The most widely used protein dye, Coomassie blue, can be "disappeared" using a bit of the reductant sodium borohydride. It was most amazing to see a heavy solution of dark stain-your-pants-forever dye go aquarium clear in a few seconds.
According to U. Wisc Physics, the far point for normal vision is infinity, and near point for normal adults is 10 inches (not from end of nose... from the lens in your eye).
I am now presbyopic as well as myopic, so my near point is (I just checked it) 5", and my far point is 9" . I used to be able to focus at 4". Even with myopia, it seems I can view an object at half the distance of many normally sighted people, yielding a magnified image compared to what they see - like a macro lens. Non myopic individuals with presbyopia will not be able to focus nearly as close: the only previously 20/20 presbyopic nearby at the time of this post reports 18-20 inches at best.
With laser correction of the myopia, this close vision does go away, as my sister discovered to her chagrin.
Wearing glasses since age 8, I've been through a lot with these eyes. I finally began to treasure the optics I was born with when I realized that what most people label myopia is really built in magnifying glasses. Some people think it's been a valued trait for craftsmen in the past, allowing "close work". Now that I'm experiencing presbyopia as well, I'm very happy to retain the ability to read printed material closer than arms length, without glasses.
As my (also myopic) sister discovered to her horror, that close vision goes away with correction to "20/20" by laser surgery. Turns out she still wears glasses all the time for near vision (yeah, she's presbyopic too - since this is the lens getting stiff, laser can't do anything for this). Though this consequence may be explained in the forms in some convoluted way, it certainly didn't come across to her before the "ax" descended.
So before you decide, think about and notice how you use your eyes. If you are outdoors a lot, and use middle to distant vision mostly, you are still a good candidate. If on review you notice you use close vision, ie tend to like to take off your glasses to check out something close or nearby, be aware that will go away.
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Yah. Just because you can't see doesn't mean it isnt' there. I hope the dyes are nontoxic. The method you describe is undoubtedly what is being done. I have another example from the world of biochemistry. The most widely used protein dye, Coomassie blue, can be "disappeared" using a bit of the reductant sodium borohydride. It was most amazing to see a heavy solution of dark stain-your-pants-forever dye go aquarium clear in a few seconds.
I am now presbyopic as well as myopic, so my near point is (I just checked it) 5", and my far point is 9" . I used to be able to focus at 4". Even with myopia, it seems I can view an object at half the distance of many normally sighted people, yielding a magnified image compared to what they see - like a macro lens. Non myopic individuals with presbyopia will not be able to focus nearly as close: the only previously 20/20 presbyopic nearby at the time of this post reports 18-20 inches at best.
With laser correction of the myopia, this close vision does go away, as my sister discovered to her chagrin.
Wearing glasses since age 8, I've been through a lot with these eyes. I finally began to treasure the optics I was born with when I realized that what most people label myopia is really built in magnifying glasses. Some people think it's been a valued trait for craftsmen in the past, allowing "close work". Now that I'm experiencing presbyopia as well, I'm very happy to retain the ability to read printed material closer than arms length, without glasses.
As my (also myopic) sister discovered to her horror, that close vision goes away with correction to "20/20" by laser surgery. Turns out she still wears glasses all the time for near vision (yeah, she's presbyopic too - since this is the lens getting stiff, laser can't do anything for this). Though this consequence may be explained in the forms in some convoluted way, it certainly didn't come across to her before the "ax" descended.
So before you decide, think about and notice how you use your eyes. If you are outdoors a lot, and use middle to distant vision mostly, you are still a good candidate. If on review you notice you use close vision, ie tend to like to take off your glasses to check out something close or nearby, be aware that will go away.