> There is only one reason you would your want your own PD measurement: your want to buy glasses online, without the expense of an optician's expertise. Ok, fin

> There is only one reason you would your want your own PD measurement: your want to buy glasses online, without the expense of an optician's expertise. Ok, fine. Fair enough, the article is from 2012. Today, there is another legitimate use for knowing your IPD - VR headsets! An incorrect IPD setting as explained in this article can over time teach double-vision and other problematic things you do not want. In VR, given the things aren't used for such large durations as normal eyeglasses the more likely effects are discomfort / headaches and (unique to VR) an improper appearance of world-scale. It's still worth getting it right!