What you might not realize is that there are I think it's something like three or four million people in the world who can't see because they have something called cataract blindness.

Cataract surgery, for example, still had to be performed without general anesthesia since ether and chloroform caused patients to vomit, something that obviously can't happen during eye surgery.

@KevinClarkNW asks, "Why does eyesight deteriorate with age?" Eyesight deteriorates with age mostly due to cataract.

So it's one of the tertiary eye care centers that provides training for cataract surgeons, optometrists, ophthalmologists.

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They command higher compensation than many other internal medicine subspecialt ophthalmologists make $477,000 after four years of residency, treating diseases of the eye and performing surgeries like cataract removal.

Therefore, cataract surgery had to be performed without anesthesia, causing patients unbearable pain.

And I remember one did mention, if we replace the lens of your eye with an implant, just like cataract surgery, you'll be able to see.

But some people can develop eye floaters much earlier, usually people who are nearsighted like myself or people who have had some form of eye surgery, such as cataract surgery, for example.