Retin-A Causing Vision Loss?

Retin-A that gets into the eyes inadvertently can cause a bit of irritation (or a lot, depending on the amount!) which can lead to corneal swelling, which in turn distorts vision slightly, just as a Lasik procedure uses a laser to shape the cornea to distort vision in a "positive" direction.

Stop getting it in your eyes and the irritation will resolve, the swelling will normalize, and your vision will be the same as it was before the Retin-A exposure. You don't need to stop the Retin-A, you just need to use less or be more careful (or perhaps not rub your eyes in your sleep).

Retin A can irritate the eyelids especially in the winter when the skin is dry to begin with.
In addition if Retin A gets into the eye, there will be irritation as well that may cause blurry vision.
Stopping the Retin A should resolve the blurriness.
Consider also that when a moisturizing cream may cause blurry vision if it gets into the eye.
Finally, there are causes of blurry vision outside of Retin A and moisturizers. If the blurriness does not improve after a few days, a visit to an ophthalmologist is in order.

It seems unlikely that you could suffer permanent blurry vision as a result of retin-a use around the eye.  I would suggest that you stop use of the retin-a completely until the vision issue resolves.  Because use of retin-a around the eye predictably causes redness, irritation and peeling, I will usually suggest that a thin layer of moisturizer be applied first and just a very small amount of retin-a be applied on top.