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.
Report Abuse. Well if a brighter star were behind a dimmer star, the dimmer star would seem brighter than the actual bright star, so you need absolute visual magnitude to know exactly how bright said star was. gcolor7of12 Â· 7 years ago. Thumbs up. 0.