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.
1 Alpha-1 blockers, used to lower blood pressure can cause a condition (that doesn't affect vision) called floppy iris syndrome.. If you are going to have eye surgery you should let your doctor know that you've been taking this type of medication, especially tamsulosin.  Clonidine is a drug used to lower blood pressure.