I'm wondering how safe these are for today camera gear, and also my new glasses. The cleaning paper is completely white and clean and what I think is a microfiber cloth was unopened and also unused. Both were stored very well.
They were among random camera and videocamera gear from my dad and I assume they were either his of his dad's, so they are at least 40 years old. I remember I had these when I was looking for my old microfiber cloths. I used to wear glasses but took a break because I didn't feel the need for them, but recently my vision has been getting worse so I got new ones and realized I didn't get a cleaning cloth with them.
Are these still good safe to modern optics?