The lacrimal and third eyelid superficial glands produce the aqueous component of the preocular tear film.
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Unfortunately, effective treatments are limited by poor bioavailability of antiglaucoma medicine due to short residence time on the preocular surface.
Tian SY, Li J, Tao Q, Zhao YW, Lv ZF, Yang F, Duan HY, Chen YZ, Zhou QJ, Hou DZ 2018, 'Controlled drug delivery for glaucoma therapy using montmorillonite/Eudragit microspheresas an ion-exchange carrier', International Journal of Nanomedicinehttps://www.dovepress.com/controlled-drug-delivery-for-glaucoma-therapy-using-montmorilloniteeud-peer-reviewed-article-IJN. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)