Kerbal Space Program

I very much do appreciate, that i'm able to now select the resolution my monitor is able to handle, but if i do so, the UI size even at 150% is not big enough to comfortably read it. I'm sitting around 50cm away from my computer and the text is only about 2mm high. I may have good eye, but i'm not an eagle. :)
I'm playing on an iMac with a 27 zoll retina display (5120 x 2880).