Hello, ( I am so sorry hear about Dr. Dan's accident, I'll check in with him later).....but maybe I can help you with your question. As to the YAG....you can count on that procedure making your vision better. In 20 years of doing YAGs for posterior capsule clouding, I have seen only excellent patient satisfaction. It is safe and very effective.
As to your primary question, the momentary blur, in the presence of an eye exam that was reported as normal, sure suggests that your blur is coming from tear film instability ( a form of dry eye syndrome). If you were my patient, with similar complaints, I would suggest getting a good tear film stabilizer, such as Systane OTC and using a couple of drops up to four times a day .
There is also the remote possibility that you might be developing a mild lower lid aging lost of eye lid tone. That too could give momentary blurring as it may also disrupt the normal tear distribution over your corneas. A good quality tear film is very important in crisp vision.
I hope this information helps you. Please let me know how your symptoms are going after the YAG and the use of tear film stabilizations drops.