I don’t know.
Admittedly I have a cataract in my left eye, so things are a bit fuzzy these days.
I was comparing it to the cow fence in the photo.
I would be shocked if that fence is even 20 feet high.
But maybe I’m wrong.
Well Im Near sighted in one Eye, Far sighted in the other and Astigmatism in both.
AND My measureing device is the Phone end of the iPhone 6S+ Charging Cord held Widthwise...