So we're very first all of our channel checks that ophthalmologists are seeing Rhopressa and Rocklatan as the pure indications to some of the existing generic options, but we're also hearing prescribers are facing some challenges because you've been in cases where Rhopressa and Rocklatan are indicated as covered by a plan.
Take context from the input text and decide on the accurate relationship between 'pure' and 'channel' from the options provided.
Options: original broadcaster, product/material produced, headquarters location, founded by