How far can the human eye see?
When you buy through connection on our site , we may earn an affiliate commission . Here ’s how it works . Earth ’s surface curves out of sight at a distance of 3.1 mi ( 5 kilometers ) . But our visual visual acuity extends far beyond the apparent horizon . If Earth were flat , or if you were stand atop a passel surveying a declamatory - than - usual mend of the planet , you could perceive shiny igniter hundreds of miles distant ....