Are all eye pencil sharpeners the same?

Some are better than others, but you can obviously tell. If so far you don't see any real problem with the sharpeners you own then you probably have a good one. A bad sharpener will break your pencil or sharpen too much or even to little. The good ones have a durable blade. I purchased mine for 4 bucks and it works well, so you don't have to pay for the high end ones to have a good one. Check on makeupalley.com if you wanted to purchase a new one. There are eye pencil sharpener reviews on there.