Empirical Earth · The Boomerangs — Flat-Earth Proofs That Backfire

How your eye works: resolution, perspective & vanishing points

The claim

“Ships, sunsets and skylines vanish from perspective and the eye’s limits, not curvature.”

What is true

◆ Refutation Perspective and the eye’s resolution are real and carefully measured, and both predict the opposite of the claim.

What is measured

Perspective shrinks things toward eye level, and a sharp eye or a zoom lens can recover anything still in the light. Neither can hide an object bottom-first below eye level. That takes a curve.

What would show this is wrong

perspective or the eye’s resolution limit, not occlusion by a curve, making an object disappear bottom-first while its top stays visible, below the observer’s eye level, over a measured distance.

Sources

  1. Dip of the horizon. The visible horizon lies below true horizontal by θ = arccos(R/(R+h)); about 1° from a 1,000 m hill and ~3° at jet altitude, reduced ~8% by refraction. A standard celesti link
  2. The human eye’s angular resolution. Normal 20/20 vision resolves detail about 1 arcminute across (1/60°), and the diffraction limit for a 3–4 mm pupil is finer still. A telescope’s larger ap link
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