Definitely check the blood pressure as it can be an issue.
Yohimbe herb has a mixture of alkoloids whereas yohimbine is one single alkaloid isolated.You said yohimbe product so I'm assuming the herb or extract thereof.Some yohimbe products have other things in there as well,check the bottle ingredients also.
Being that yohimbine alkaloids are indole alkaloids I think that it would be possible to get dilated(is that what you mean by "swollen" pupils?) pupils. If thats the case I could see you getting blurry vision.When I was younger and went to the eye doctor he put atropine in my eyes to dilate them to do the eye exam,and I would get blurry vision.
At drugs.com it mentioned side effects of a yohimbe overdose which included "increased blood pressure(severe headache,BLURRED VISION,flushing)..."