I have the hardest time focusing at midranges in poorly lit indoor spaces haha. It took maybe 20 shots to finally get one where I had the focus right. I suppose I could have shot at f4 or something but I like the natural vingetting for our weekly photos. My right eye is also slightly worse than my left, I may have to try and adopt a cross face shooting style.
At close distances like this the focus is actually quite easy to nail because the fine details become larger.