Nampo-dong

Compared to airplanes, although the flight takes longer, you can move around freely, lie down to rest, and even have a large public bath. Immigration is quick, and there are even people queuing with their suitcases – a very interesting first-time experience.

I had previously noticed this store through other channels, and luckily I saw someone share this discount before I went. It's also convenient to buy and use it on the same day. The owner and optometrist were very friendly, the staff were very helpful, and the location is great – you can get your prescription checked before going shopping.