Near-far vision exercises can improve eye and lens musculature and movement, enhancing vision acuity.

“And then in doing that for even a minute or two, you'll find is a bit of a strain on your eyes, but you can actually build up the musculature and the neuromuscular connections that allow you to do that more efficiently. And that has been shown to improve certain aspects of vision, especially when people are diligent about doing those exercises, not necessarily every day, but let's say three days a week or so.”

“So this is best accomplished, I think, by holding out a pen or pencil in front of your eyes, in front of your head, and focusing very intensely through what's called a vergence eye movement, where you bring both eyes to the tip of the pen and then moving that pen closer and closer and closer to your eyes, where you get close enough that you actually have to deliberately bring your eyes-- for those of you listening, this is what I'm doing right now-- to the point where it's blurry and you can no longer hold it in sharp, crisp relief.”

“And this is where some of the so-called near-far exercises can be very useful.”

“They can be very fast. I actually find them fun for reasons that escape me entirely.”