No, it is better for you not to drink any alcohol including the beer just after the cataract surgery. This is because that the alcohol can easily paralyse the optical nerves, which will do some harm to the whole effects of the surgery or hinder the smooth recovery of your eyes after the surgery. The care after the surgery is no less important than the surgery itself. You should drink or smoke or eat any irritative foods such as spicy dishes. Instead, you should eat more vegetables, fruits, dairy products, eggs, cod-liver oil, and so on. Take adequate rest and sleep, do moderate exercises such as going for a walk rather than fierce sports like basketball or swimming. Do not read or watch TV for too long, nor in strong light.