Great drops - if you want no preservatives, buffers, emulsifiers, etc
These saline drops are better than other contact lens drops, having no toxic chemicals.  These can also be used when you have a hard time generating tears by yawning and eyes are dry, but you don't want to use all the chemicals in most drops that cause bad side effects.  The nice thing is, unlike other drops, you can use these a lot without any major issue.  Just keep massaging your meibomian glands, expressing meibum, generating tears, hydrating yourself, getting good sleep and you will have less dry eyes.  Contacts can make eyes dry, so this saline can be used to moisturize eyes too sometimes.  :)  While not as comfy as some real eye drops for dry eyes, they hold one advantage: price and far fewer side effects when used often.  :)  Just don't overuse them every 2 hours as some do, meaning only 1-2 drops at one time, a few times a day.  They got pH 6.5 or so, like all 0.9% NaCl solutions do, due to dissolved carbon dioxide.  But having no buffer, this pH doesn't hold, with ocular pH overriding it far quicker than buffered pH drops, so that's a good thing since physiological pH is around 7.3 for most healthy people.
Rating: 5 stars