Is it in my head?

I got an eye exam the other day with a new prescription, everything was different (power, cylinder, axis numbers) and since that eye exam, I’ve felt really really really good. My days have been more productive, I don’t feel “off” like I have been feeling the last few years and I’ve been feeling like my old self when I used to be happier. 5 years ago, my eye doctor of 20 years retired, and I never got the prescription from him because I thought he would always be there. I've gone to a few local eye doctors since and the prescriptions have all been similar but this new eye doctor I went to the other day gave me a new prescription unlike the ones I received the last few years. Maybe the ones the last few years, it was over correction, or a weak one especially since I have astigmatism. I’ve been feeling very similar to how I used to feel 5 years ago and even before the 5 years like thinking clearly, a lot less irratated, more energy, more “active” mindset, better decision making, workouts have even been better and just a more smoother way of thinking. So I wanted to ask, is this all in my head or was this prescription a legitimate reason to why I haven’t been myself.
Is it in my head?
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