I have a epson 3810 printer/scanner can anyone tell me if you can refill ink cartridges?

I haven't been able to find refill kits for these, which probably means you can't refill them. As an alternative you might want to consider buying compatible cartridges. Here is one place to get them: http://www.castleink.com/Epson-STYLUS+CX鈥?/a>