HK’s approach to aircon is pretty bad: always on full blast, but buildings tend not to be designed with insulation (acoustic, temperature, anything) in mind (for whatever reason). Makes it rather easy to get a headache when you go indoors after some time outside. That’s one reason people carry jackets in the height of summer.

Does always having protective glasses on affect your sleep cycle? I suspect not getting enough light and UV in the day gives me problems at night, especially with eye strain.