A friend of mine just got his eyes checked the other day and his eyesight improved by .25 in each eye on his prescription since he’s been looking at my stereo art 
Awesome!
So here’s an eye exercise to help you improve your eyesight too.
Cross your eyes until the images merge on top of each other. When you start to see the 3D, try looking from one flower to another.
They are all at different places in space.
After that, anything goes. There’s different areas of space in the background, and even in the girl. By mixing up any combination of where to look, your eyes will get a great work out. As with any muscle, a little work out will make it stronger.
