The important thing is to get the drops into the eyes. And to do it as often as prescribed. Pulling down a bit on bottom lid helps drop get liquid under the lid quicker but just blinking and few times will also spread it around if it is dropped on the main eyeball. That is method I use and I have been doing eye drops for three decades now and my glaucoma readings seem to stay stable so my eyes must be absorbing the drops some how.
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