There are 12 drops in 1ml of eye-drop so it will have 30 drops.
sorry to contradict, but the number of drops in 1 mL will vary with the product due to different densities of the liquid preparations (solutions vs suspensions) and varying bottle opening sizes
typically, 1 mL = roughly 20 drops
travatan Z 2.5 mL bottles have an avg of 80 drops per bottle (tested by actually counting drops from multiple bottles)
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