Electromagnetic Leakage: The Retinal Channel

Established physics. The human eye is the canonical near-perfect electromagnetic absorber at the chemical-biological scale. Published retinal physics measurements show η > 0.

2.1 — Setup and measurements

The human eye functions as an electromagnetic absorber. Published measurements [Hammer et al. 2022; Mordant et al. 2011] report internal reflectance of the eyewall at 4.24–34.77% (wavelength-dependent, varying with pigmentation) and a Sphere Multiplier of 1.13–1.59 (enhancement of effective irradiance due to spherical geometry and multiple internal reflections).

2.2 — Escape fraction

Combining internal reflectance with the geometric factor (pupil subtends a small solid angle relative to interior surface):

η_escape ≈ 10⁻⁶ to 10⁻⁵ (2.1)

The escaped photons carry information about the boundary (fundus tissue properties: melanin, haemoglobin, RPE), not the input image. Coherent image in, thermal/diffuse reflectance out.

2.3 — Where c appears

The coupling strength between light and matter is governed by the fine-structure constant:

α = e² / (4πε₀ ℏ c) ≈ 1/137 (2.2)

c appears in the denominator. α determines the absorption cross-section of every atom. The absorption cross-section of rhodopsin is bounded by:

σ_abs ∼ α × λ² / (2π) (2.3)

Because α < 1, the cross-section is always less than the geometric area. Perfect absorption requires α ≥ 1, which requires c ≤ e²/(4πε₀ℏ). For our universe, c far exceeds this bound.

2.4 — Structural features

Claim C2 (Established). Electromagnetic absorbers (biological tissue) exhibit the same six structural features as gravitational absorbers: (S1) η < 1; (S2) leakage is diffuse/thermal; (S3) leakage carries boundary information, not input; (S4) wavelength-dependent; (S5) spherical geometry enhances absorption; (S6) c constrains η via α. [Hammer et al. 2022; Mordant et al. 2011]