Blue Tarantulas. In a way itâs a shame that most people think of the standard Chile Rose Haired and the Curly Haired spiders when they think of tarantulas because many people think that all tarantulas are a boring brown color. Of course this couldnât be further from the truth and if you know what species to look [â¦]
Answer: The black dot in your eye is called a pupil, it contracts and widens to regulate the amount of light entering the eye. It is really just a hole in the center of yo â¦ ur eye that allows light to pass through, that is really it. + 6 others found this useful. Sharon Robinson.
Your retina is a thin layer of tissue that lines the back of your eyeball. It turns light into signals to the brain, which interprets them as sight. When a vein in the retina becomes blocked, itâs called retinal vein occlusion. This can give you blurry vision or even sudden permanent blindness in that eye. It's similar to retinal artery occlusion, which is sometimes called an eye stroke. The damage happens when a blocked vein keeps blood from draining from the retina. That raises pressure inside your eye, which can cause bleeding, swelling, and fluid leaks. Retinal vein occlusion can harm your eye in minutes. Usually, a blood clot blocks the vein.