https://www.sigmaaldrich.com/IL/en/product/mm/aawp04700
Biologically inert | Versatile cut disc for biological and environmental monitoring applications | hydrophilic white 47 mm filter | ethylene oxide, gamma and...
membrane filtermmmcecutdisc
https://support.apple.com/en-bh/guide/motion/motn169fd0af/mac
In Motion, the Disc Warp filter (effect) stretches the image outward around a circular region.
in motionapple supportdiscwarpfilter