--- title: "Meaning & Key Takeaway of: Under optimum conditions the human eye…" description: "\"“Under optimum conditions the human eye can detect a candle at a distance of fifteen miles.”\" — Paul W. Brand" image: "https://sms4smile.com/quotes/i/dfb/paul-w-brand-85120_candle_under-optimum-conditions-the-human-eye-c_352918.jpg" --- # Under optimum conditions the human eye can detect a candle… ![“Under optimum conditions the human eye can detect a candle at a distance of fifteen miles.” quote by Paul W. Brand](https://sms4smile.com/quotes/i/dfb/paul-w-brand-85120_candle_under-optimum-conditions-the-human-eye-c_352918.jpg) [Download](https://sms4smile.com/quotes/i/dfb/paul-w-brand-85120_candle_under-optimum-conditions-the-human-eye-c_352918.jpg) [Open image](https://sms4smile.com/quotes/i/dfb/paul-w-brand-85120_candle_under-optimum-conditions-the-human-eye-c_352918.jpg) > ““Under optimum conditions the human eye can detect a candle at a distance of fifteen miles.”” Paul W. Brand ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. The eye can perceive a small light source from very far away under ideal conditions. **In simple terms:** Eyes can see a candle fifteen miles away. Key Takeaway Recognize human sensory limits. Themes perception human biology limits Mood informative curious Type scientific educational When to use this quote - night navigation - astronomy - safety signaling Key Concepts Vision sensitivity Questions to Reflect On - How does this fact affect design of visual alerts? - What limits affect everyday sight? A Different Perspective Real world conditions rarely match optimal lab settings. ★ ★ ★ ★ ★ No ratings yet [Candle](https://sms4smile.com/quotes/about/candle/) ## Related quotes > [“The human eye is restricted to see the useen, because there’s a price to be paid to the rulers of this image and if…](https://sms4smile.com/quotes/michael-bassey-johnson/the-human-eye-is-restricted-to-see-the-useen-because-there-s-a-price/) [Michael Bassey Johnson](https://sms4smile.com/quotes/author/michael-bassey-johnson/) > [What the human eye observes casually and incuriously, the eye of the camera (the lens) notes with relentless fidelity.](https://sms4smile.com/quotes/berenice-abbott/what-the-human-eye-observes-casually-and-incuriously-the-eye-of-the-2/) [Berenice Abbott](https://sms4smile.com/quotes/author/berenice-abbott/) > [The complex human eye harvests light. 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