There's a few minimal ocular changes that sometimes happen. My eyes have widened and opened up more too, the outer corners have also tilted more upwards, whereas before they were pointed downwards. Love it xD
Of course, the opening up more thing could be a result of being happier? Maybe? I mean I was never really happy back then and now I am, and it's known that your eyes smile when you're truly happy

so maybe out eyes are just smiling bright now lol