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.
Beta Cancri is the brightest star in the constellation, with an apparent visual magnitude of 3.5. It is a binary star that consists of an orange K-type giant and a fourteenth magnitude companion 29 arcseconds away. Beta Cancri is approximately 290 light years distant.