Contact Lenses are available in: Yearly Format & Disposable Format
Disposable Lenses are available in:
- Monthly Disposables
- 15 days Disposables
- Daily Disposables
So you should ideally dispose off the monthly lenses after one month of use & Daily disposables after one day of use.
The reason for this is that disposable lenses are thinner & high water content lenses. Hence they are more comfortable on the eye. But because of this feature, they attract Protein deposits easily.
The protein deposits from our natural tears then lead to eye allergies & inflammations. Therefore they should be discarded accordingly.
Also contact lenses should never be flushed in to the drain or sink as the microplastics damage our environment.
They should be thrown into the dustbin with our normal garbage.