How to dispose of contact lenses is simple once you know the one big rule: never flush them down the toilet or wash them down the sink. Lenses are made of plastic polymers that slip through wastewater treatment and break into tiny fragments. Put used soft lenses in the household trash, and recycle the cardboard boxes and plastic solution bottles where your local program accepts them. Blister packs and foil lids may go to a special recycling program.
Why not flush or rinse
Contact lenses are small, flexible, and slightly denser than water, so they sink in treatment tanks instead of being skimmed off. Treatment processes can break them into microplastic pieces that end up in sludge spread on fields or released into waterways. Researchers have found that a meaningful share of wearers flush lenses, which adds up to a large amount of plastic each year.
What goes where
| Item | Where it goes |
|---|---|
| Used soft lenses (daily, biweekly, monthly) | Household trash |
| Rigid gas permeable lenses | Trash, or ask your eye doctor about returns |
| Cardboard boxes and paper inserts | Paper recycling |
| Solution bottles | Plastic recycling if accepted; rinse and replace cap if your program says to |
| Lens cases | Trash in most areas; small items often are not sorted by recyclers |
| Blister packs | Trash, or a manufacturer or eye-care recycling program |
| Foil lids | Trash, or collect into a large ball if your program accepts aluminum foil |
Small plastics like blister packs often fall through sorting screens at recycling plants, which is why many programs do not accept them loose.
Contact lens recycling programs
Some lens manufacturers sponsor mail-back or drop-off programs that collect used lenses, blister packs, and foil. Many optometrists and optical shops host collection bins. Ask your eye doctor or check the lens maker’s website.
Tips for daily lens wearers
- Keep a small container by the sink for used lenses and blisters.
- Empty it into a recycling program box if you participate, or into the trash.
- Peel foil lids off blisters to separate materials.
- Break down boxes for paper recycling.
Expired or unopened lenses
Expired lenses should not be worn. Unopened lenses in their blisters can go in the trash or a lens recycling program. Some clinics accept unexpired, unopened lenses for donation, depending on local rules.
Solution and eye drops
Used lens solution can go down the drain in normal amounts. Empty bottles go in recycling where accepted. Expired prescription eye drops can go to a medicine take-back program. See returning unused medicine.
Related items
Needles from medical treatment need sharps containers. See disposing of household sharps. For thin plastic packaging, see plastic film and bubble wrap.
How to dispose of contact lenses FAQ
Can you flush contact lenses down the toilet?
No. They can break into microplastics during wastewater treatment.
Are contact lenses recyclable?
Not in curbside recycling, but some manufacturer and eye-care programs collect them.
Can contact lens blister packs be recycled?
Usually not curbside because they are too small; use a special program if available.
Where do I put old contact lens cases?
Usually the trash.
Can I recycle contact lens solution bottles?
Often yes, if your local program accepts that plastic.
The bottom line
How to dispose of contact lenses: put used lenses in the trash, never in the toilet or sink. Recycle boxes and solution bottles where accepted, and use a manufacturer or eye doctor program for lenses, blister packs, and foil if one is available.
Guides and tools
Household hazardous waste guide · Dump cost calculator · All material guides