Yes, ear infection is contagious, thus it is likely that ear infection can cause pink eyes if you let it untreated. As we all know that the main cause of pink eyes can be the eye infection, which is caused by bacterial, viral, and allergic. And you should know that bacterial conjunctivitis is caused by the same bacteria that cause ear infections. In other words, an ear infection can spread to the eyes and cause conjunctivitis, and eye infection. When you have eye infection, your eyes can be itchy, and finally give rise to pink eyes. To this situation, you have to be careful about it. Don't touch your eyes especially of the fingers which have touched the ears. Besides, you can just drop some eye drops so that it can relieve the symptom. But if you the situation became worse, you are supposed to take an physical examination as soon as possible.