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There’s a limited space on your eye that can hold extra liquid. After that limit is met, the excess will be blinked out of your eye, absorbed into tissues around your eye, or drained through your tear ducts. The bigger the initial drop, the bigger your eye’s response to the foreign sensation. This means more medication is absorbed into your body, instead of just in your eye as intended by your doctor. This can have what is called “systemic side effects,” where the medication acts as if it was administered through an IV. Because the severity is volume-dependent, the smaller drops have been shown in some clinical studies to be safer.

The Nanodropper adaptor is a sterile medical device and is not intended to be taken off the bottle once installed. We recommend using one adaptor per medication to prevent risk of contamination, infection, and injury.

The Nanodropper adaptor is a sterile medical device and is not intended to be taken off the bottle once installed. Please use one adaptor per medication bottle and discard at the end of the bottle-life. There are no FDA-approved home sterilization methods for medical devices. Reuse of the Nanodropper may lead to contamination, infection, and/or injury.

Our recommendation is always to follow the instructions included with your medication and to have a conversation with your eye doctor and follow their instructions. For general guidance, most preservative-containing eyedrop bottles are safe to use up to the printed expiration date on the bottle, as long as you follow the manufacturer’s storage guidelines.

If fluid gets trapped between the original bottle tip and the Nanodropper tip, it can cause two types of problems:
1) With certain types of medications this trapped fluid can clog the tip of the Nanodropper and prevent future drops from coming out, or
2) Sometimes this trapped fluid can create a siphon effect where multiple drops will drip out as soon as the bottle is un capped or turned upside down.

Fortunately, we have an easy fix for both problems! Please follow the steps in this video everytime you take a drop to avoid those problems in the future.