Itâs Not the Needle That Hurts. I believe the pain is due to the solution used to clean the eye prior to the injection and not the needle itself. The solution is called âBetadineâ and is commonly used to cleanse the eye prior to intraocular injection. Most retina specialists use this a part of their routine.
For numerical convenience, an object brighter than 0th magnitude has a negative magnitude; the brightest star, Sirius is magnitude -1.4; the full moon is magnitude -13, and the Sun is a blazing -26th magnitude.
R136a1 radiates away nine million times more energy than our Sun, and would appear 94,000 times brighter to our eyes if it replaced it. In fact, it is the most luminous star ever discovered. It has a surface temperature of more than 53,000K and it will only live for two million years.