“…Herbal products with the same effect include niacin, kava, echinacea, and anticholinergic alkaloids (Askeroglu et al, 2013). Moreover, corneal toxicity can be caused in a number of individuals by fluoroquinolones, nonsteroidal anti-inflammatory eye drops, glaucoma eye drops, preservatives in eye drops, aminoglycosides, chemotherapeutic medications, topical anesthetics, cyclooxygenase-2 inhibitors, bisphosphonates, retinoids, topical steroids, topical iodine, and some herbal medications such as black mustard, chamomile, cypress spurge, goa powder, and psyllium (Fraunfelder, 2006).…”