Hubble uses a contact lens with poor oxygen permeability...which can lead to infection/swelling. "Hubble contacts are made with an old material called methafil

Hubble uses a contact lens with poor oxygen permeability...which can lead to infection/swelling. "Hubble contacts are made with an old material called methafilcon A, which has a Dk/t of 18.8. Research shows that a Dk/t of 24 is necessary to maintain cornea integrity and avoid swelling." https://www.reddit.com/r/YouShouldKnow/comments/9o6a0h/ysk_the_contact_lens_company_hubble_is_fulfilling/ https://www.reddit.com/r/YouShouldKnow/comments/9o6a0h/ysk_t...