Yeah that's normal when you reach nodding dosages.
I've never been able to try heroin, but a large dose of Dilaudid would give me a wonky eye lol...not really double vision but more like one eye wonders to the side or something lol.
Never looked in a mirror while this is happening lol I feel too damn good, but it's not serious.
Just be careful and make sure you don't take too much...if i'm nodding it means I took too much...haven't truly nodded in about a year! But I like to do stuff when im opied up though although a majority of the time i'm just laying down with my eyes closed searching my skull for the nod, but I usually don't get much more of a nod then marijuana would provide...
Kinda more like meditation than a nod really, I don't consider it a nod unless I have trouble keeping my eyes open and have dreams just when I close my eyes...and I could pretty much do this while standing up. Now that's a nod..
And I almost always combine my dose of opiates with a low dose of alprazolam (.5-1mg) so that could contribute.
But yea I mainly get it after opening my eyes when they've been closed for a few minutes and I try to look at the t.v. or something.