Frequently Asked Questions

Safety and Use

What is the right dose for eyedrops?

Multiple studies support that 7-10 microliters is the ideal-sized drop size for the average human eye. Typical eyedrop bottles administer upwards of 50 microliters. The Nanodropper adaptor reduces the size of each drop the ideal 10 microliter range.

Why are smaller eyedrops safer?

There’s a limited space on your eye that can hold extra liquid. After that limit is met, the excess will be drained by your tear ducts or blinked out of your eye. 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 clinical studies to be safer.

I use 2 medications, can I share one Nanodropper for both bottles?

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.

Can I clean and reuse the Nanodropper adaptor?

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. Home sterilization has not been studied with the adaptor, and can lead to contamination, infection, and injury. Do not attempt to clean or reuse any parts of the Nanodropper adaptor.


When should I throw away the bottle of eyedrops?

Expiration of medications is a tricky science. Our recommendation is always to have a conversation with your eye doctor and follow their instructions. For general guidance, the American Academy of Ophthalmology recommends that you throw away your bottle of eyedrops 3 months after you open the bottle.


Is the Nanodropper adaptor recyclable?

The cap and base are #2 HDPE plastics. They can be recycled normally with other clean plastics. #2 plastics currently have the highest rate of recycled plastics, and are not one of the “mixed plastics” that actually end up in landfills. Mixed plastics are labeled #3-7 and currently lack the ability to be recycled into new products at the end of their life.

Why is the shipping box so big?

As a medical device, our shipping boxes have to be validated to meet FDA guidelines. We’re working on shipping Nanodropper adaptor sets of 1-4 quantities in smaller boxes in the future. Also, please see our list of local clinic partners to purchase directly in-person. By choosing this option, you’re helping our environmental efforts to reduce the number of shipments and boxes!

How is Nanodropper helping with healthcare waste?

The environmental impact of manufacturing medications is something that we know is both understudied and burdensome. Eyedrops are no exception, and medication waste, packaging and shipping of those medications, and even the number of times that you are visiting the pharmacy to pick up these medications is something Nanodropper is helping to reduce, one drop at a time.

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