Update: Legolas’ pupils are about 3.5 cm wide each. Now drawing kawaii Legolas on physics assignment.

And they told you science was no fun.

Science!

I’m going to do it. I’m going to hand it in.

Legolas’s pupil size isn’t the problem here, though. 5 leagues is 17.262 miles. The curvature of the Earth means that for a person of average height, the visual horizon is less than three miles away. Even if your vision is telescopic and the atmosphere is perfectly clear, you can’t see around the planet. If they were standing on a hill, it would have to be at LEAST 198 feet above sea level in order to see the horizon at 17.2 miles away, with nothing tall in between. Which, knowing Rohan, isn’t impossible.

But consider: Elven satellite eyeballs.

All this mathy bullshit to avoid admitting: CHECKMATE ROUND (middle) EARTHERS