The Wonders of the Human Eye: Nature's Masterpiece
Imagine a machine using light to interact with the world around it, each person responding uniquely. That's what the Creator envisioned with the human eye. A testament to its complex design and function, the eye is a marvel of biological engineering.
- הרב יוסף ברוק
- פורסם ו' שבט התשע"ד

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"The Creator envisioned a machine through which light makes all beings on earth respond uniquely. Before each person, there are two such machines—the right eye and the left eye."
The intricate wisdom found in the eye is boundless. As generations pass, scholars marvel at its hidden brilliance, revealing the Creator's ingenuity.
To uncover more about the mysteries of the human eye, we speak with one of Israel's top experts, Professor Pinchas Nemet, head of the Ophthalmology Department at Assaf Harofeh Medical Center. His insights aim to awaken us to the wonder of these extraordinary machines, known as the 'eyes', planted into our heads by Hashem.
The eye: the world’s most sophisticated camera. It connects to the brain with over a million nerve fibers, delivering an extraordinary visual experience. Our eyes perceive color, adapt to different lighting conditions, provide peripheral and central vision, and offer depth perception—all with unparalleled complexity.
While strolling city streets or studying texts, we scarcely comprehend the complexity of these two small spheres, merely 2.5 cm in diameter, yet regarded as the most advanced cameras globally. The back of the eye houses 127 million visual cells, capturing images in diverse conditions, transmitting data instantaneously to the brain.
The eye alone can detect both near and far vibrations, small and large, thanks to its automatic 'zoom' feature operated by tiny muscles, more efficient than the most sophisticated cameras. When light enters our eyes, approximately seven million color sensors adjust our vision to optimal light conditions.
If there's insufficient light for accurate color images, 127 million black-and-white sensors activate, ensuring continued perception. A minor fault here can lead to color blindness. A complex 'computer' in our optic nerve processes signals from these sensors, transmitting data at a rate of a billion impulses per second!
Simultaneously, the pupil oversees and adjusts light intake for maximum image clarity. "The pupil functions like an aperture, constricting in bright light and dilating in dim light, filtering light precisely," explains Professor Nemet. Ophthalmologists, aware of possible ocular disorders, remain astounded by the eye's complexity.
Professor Nemet, demonstrating a laser procedure for myopia at Assaf Harofeh, emphasizes additional mechanical features like the eyelids, which protect and maintain the eye's condition. Eyelashes shield eyes from dust and moisture, while a tiny 'lubrication station'—the tear duct—ensures necessary hydration.
Tears enable smooth, friction-free eye movement and eliminate foreign particles. This moisture layer on the cornea enhances vision, defends against infections, and cleanses the eye during sleep, ready to be rinsed away each morning.
The divine creation of our eyes, an incomparable gift, reflects the harmony between human culture and biological design. Humanity isn't just built to survive harsh conditions but crafted for intellectual endeavors, unlike any other creatures.
Our eyes aren't merely tools for locating food or evading predators—they are designed for examining complex shapes and texts, adapting to intricate intellectual tasks, and facilitating mental engagement, as Professor Nemet shares.
The eyes' ability to relay messages to the brain underscores the unparalleled human intellect compared to other species. While animals have minds suited for survival, humans possess a mind developed for profound understanding.
Professor Nemet states, "Hashem endowed us with eyes aligned to our mental capacity, enabling precise tasks through our 'depth perception'. Most animals see broadly, lacking human-specific visual focus."
He highlights Talmudic teachings linking the eyes to the heart, shown in how pressing on the eyes can slow a rapid heartbeat, demonstrating a physiological connection between eyes and heart.
The eye's miraculous healing ability is well known; today's medical techniques focus on allowing the eye to heal independently, interfering minimally. Physicians corroborate Talmudic wisdom that extreme efforts can strain vision, yet routine healthy use doesn't harm the eye, refuting misconceptions about modern reading habits.
Despite theories on myopia's causes, pattern disparities across nations indicate it's still a mystery. The eyes, indeed, mirror our emotional state; they're sensitive to sadness or illness, confirming the expression "eyes are the window to the soul."
Professor Nemet remarks, "The pupil reflects a person’s emotions, contracting and expanding as appropriate." Thankfully, our eyes’ resilience affirms that sight is perhaps our greatest gift.