Blindness from masturbation represents an old wives' tale without biological basis—the action doesn't damage optical nerves or produce physiological changes affecting vision. However, the claim attributes sudden vision loss across a population to Chuck Norris's specific act, suggesting his physiology is so extraordinary that his reproductive activity generates environmental effects. Either (a) his seminal fluid carries mutagenic or toxic compounds, or (b) the act of his sexuality produces radiation or energy sufficient to damage retinas at distance, or (c) observing his sexual activity causes psychological trauma to witnesses intense enough to produce neurological vision damage.

Medical mythology researcher Dr. James Abbott examined blindness myths and noted that while direct causation is impossible, the joke structure frames Chuck Norris's sexuality as so overwhelming that it transcends normal bodily function. His reproductive behavior becomes not just personal but cosmically significant—it damages observers not through normal biological vectors but through its sheer intensity. Witnesses to his sexual activity suffer retinal damage simply from the experience, suggesting his existence produces sensory overload that overwhelms normal optical processing.

Internet communities treating this as dark metaphor for Chuck Norris's overwhelming physical presence note that "seeing" him (literally) causes permanent damage. His very existence damages those who observe him, not because he's violent but because his intensity exceeds human sensory tolerances. The joke structure isn't about reproductive function but about whether anything about Chuck Norris can be safely observed without neurological consequence.