Silly gal, I wasn't offering to "sell" you Eyebright, I was offering to replace what you have already at no charge (I guess I didn't make that clear).
Keep them both for using internally - for the 4 oz bottle, 1/2 ounce is 1/8th "part" (1 tablespoon), so you can just add 1T of your Cayenne tincture to the 4oz bottle (and 1/2 tablespoon to the 2oz bottle) And I'll send you a 2 oz bottle to use for the eyewashing.
There's no need to send anything back - sealed or unsealed I would never re-sell it (so it'd just be giving money to USPS unnecessarily).
Let me know on the 'anything else' - I'll wait to send this 'till I hear from you.