It can depend on what type of green contact lenses you purchase. Some of the theatrical and plano costume green contacts that are not designed for vision correction will not typically last as long as some of the higher quality green contacts you will buy for every day use.
Typically if you are buying green contacts just for show, let’s say for Halloween or a costume, those will usually last between one and three years, but that can also vary depending on how well you take care of them, and how much use they get.
Proper care of your green contacts will make a big difference in how long they last you, and what kind of condition they stay in. If you wear them out constantly after you purchase them, don’t keep them in solution when not wearing them and handle them roughly, they might only last you a month. On the other hand, if you buy premium quality green contact lenses, wear them on special occasions, take proper care of them, store them correctly and handle them very carefully, you can have them for years.
It’s very important that you notice any tears, breaks or problems with your green contacts that you do not attempt to wear them any further. If you try to wear contacts that are damaged in any way, they can have serious complications and possibly injuries to your eyes. Even the slightest rip or tear in your contacts can damage your eyes very easily. It’s always best to replace your contacts or have them inspected by a professional if you feel anything different or any sort of discomfort when wearing them.
It could also be from the contacts not being the right size for you. While most people’s eyes will fit comfortable with the standard curves and diameter you might find better luck with a higher or lower curvature or diameter than what comes standard. Fortunately most contact lens dealers give you these options to choose from.