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.
1 Antares B is ten times more massive than our sun and around 150 times brighter, but as a result of it being dwarfed by its massive parent star it cannot be viewed without the aid of a telescope.  Antares is around 10,000 times brighter than the sun.