I recommend Gasan Eye Clinic in Gasan-dong.

Gasan Eye Clinic

Address: #110, Building A, Woorim Lions Valley, 168 Gasan Digital 1-ro, Geumcheon-gu, Seoul

Website: https://gasaneye.modoo.at/

This is Gasan Eye Clinic, where many office workers go for eye disease treatment.

It is very accessible as it is close to the station.

However, I recommend that you avoid lunch hours and check the working hours carefully.

If you go, they will provide you with friendly and good treatment.

They say that it works well for allergies, hay fever, etc. :)