Signs of Diabetes

Blurred vision when I wake up in the morning…?

This question has been asked before, but I didn’t find one similar to my own.
First off, I know I don’t have diabetes (my sister has it and I test my blood sugar daily).
Secondly, I just purchased a mask for my eyes to help me sleep (this was on Saturday) and since I have been using it, I have woken up with blurry vision- either in one eye or both eyes- that gradually dissipates as the day moves forward.
Before going to my doctor, I want to know if it’s plausible to say that it:

A) Is constricting my blood vessels and therefore giving me blurred vision; or
B) The moisture is retained in my eyes and causes blurred vision.

I hope you can enlighten me on the matter. Thanks

Your eye is just affected by the mask e.g when you put your finger on one eye for ten seconds and then open it your vision will be blurred for a bit. This could last longer for you because you have the mask on all night.