Feb 21, 2024
Can we always believe our own eyes?
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Can we always believe our own eyes?
sunbeams
as I sat in the passenger seat, I gazed out the window, my poor vision scanning the passing scenery. Suddenly, a warm glow caught my attention. At first, I thought it was just a reflection or a trick of the light, but then I saw them - sunbeams! Dancing across the dashboard, illuminating the car with a soft, golden radiance.
My heart skipped a beat as I gasped in wonder. I had never seen sunbeams before, only heard others describe them. As a visually impaired individual, my world was often a hazy, indistinct place. But in that moment, the sunbeams pierced through the fog, and I felt like I was truly seeing the world for the first time.
Tears pricked at the corners of my eyes as I reached out a trembling hand, as if to touch the sunbeams. I felt like a child experiencing magic for the first time. The driver, my loved one, smiled and took my hand, understanding the significance of this moment.
As we drove, the sunbeams followed us, casting a warm glow over everything. I felt like I was bathed in liquid gold, my heart overflowing with joy. For the first time, I felt like I was a part of the world outside my window, connected to something bigger than myself.
In that moment, I knew that I would never forget this feeling. The sunbeams had awakened a deep sense of wonder and gratitude within me. I realized that even in the darkest moments, beauty and light are always just a glance away.
As we continued our journey, I gazed out the window, my eyes drinking in the sunbeams. I knew that I would carry this memory with me forever, a reminder of the magic that awaits us all, even in the most unexpected moments.
Clear to See
We often pick out patterns in everyday life, but patterns are also integral to our sight too. Our retinas: light-sensing region at the back of our eye, need to develop following the right pattern. This involves defining a high acuity area (HAA); responsible for our ability to see small details, in the region of the retina closest to the temple. Without it, our clarity of vision can be impaired. HAAs are common in many diurnal (active in the day) organisms, including humans and zebrafish. Researchers studying the retina in developing zebrafish embryos have discovered that the foxd1 gene supports HAA formation. Normally defined by a higher density of light-sensing cells that are longer in length, HAAs in embryos without foxd1 (pictured) lose that density, and the cells are shorter (right-hand side; green and magenta), decreasing the resolution of sight. This video shows layers of the eye stacked on top of each other, moving from back to the front.
Written by Sophie Arthur
Video by María Hernández-Bejarano and colleagues
Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain and Department of Cell and Developmental Biology, University College London, London, UK
Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)
Published in Development, December 2022
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