Correct understanding about IOP 1. Normal value range: 10-21mmHg. 2. It is not that all within this range are normal, nor is it that all not within this range are abnormal. 3.The IOP of patients with different conditions have different safety limits, so the target IOP varies from person to person. 4. The IOP after surgery can be lower than 10 mmHg and most are normal. The goal of glaucoma treatment To control IOP to a safe range, i.e., to achieve the target IOP and maintain stability, and to stop or delay further progression of optic nerve and visual field damage caused by glaucoma. Optic nerve and visual field damage that has already occurred cannot be restored to normal. Treatment of glaucoma 1.Medication. 2.Laser treatment. 3.Surgical treatment. There are different treatments for patients with different conditions. Your doctor will discuss the treatment plan with you after a careful examination.