What are the most common symptoms of open angle glaucoma?

No symptoms. One of the things about open angle glaucoma is that the peripheral vision loss "sneaks up" on folks. There are no symptoms, and the sign of peripheral vision loss is not noticeable until the vision loss is advanced. If there is a suspicion or family history, have a proper evaluation by an eye doctor.
No symptom. Open angle glaucoma typically has no symptoms. There is no pain and you will not notice vision loss until the end stage.