Assertion: lens | /r/HasProperty | worn
Facets:
Source sentences:
text: He experimented with fitting the lenses initially on rabbits, then on himself, and lastly on a small group of volunteers, publishing his work, "Contactbrille", in the March 1888 edition of Archiv für Augenheilkunde.[citation needed] Large and unwieldy, Fick's lens could be worn only for a couple of hours at a time.[citation needed]
text: With "two-step" products, the hydrogen peroxide must be rinsed away with saline before the lenses may be worn.