What are the floating dots that we see in our eyes?
Have you had this experience- you are outside in the sun, looking at the bright blue sky, and you suddenly notice white or transparent dots floating in your eyes! This phenomenon happens in our eyes, when red and white blood cells pass over the retina of our eye. The retina is like the film in a camera, lining the back of your eye and helping you see colours, shapes and details by turning light into electrical signals for your brain to understand. The red blood cells in the retina are invisible, because light from the sky ends up passing through them. However, white blood cells are bigger and more opaque (they are not invisible like the red blood cells). The light thus cannot pass through them. So, the floating dots that we think we see in the sky are actually our own white blood cells in our eyes!
