American Academy of Ophthalmology Glaucoma Preferred Practice Guidelines
| Visual field severity | |
| Mild | Normal visual field |
| Moderate | Visual field abnormalities in one hemifield that are not within 5 degrees of fixation |
| Severe | Visual field abnormalities in both hemifields and/or loss within 5 degrees of fixation in at least one hemifield |
| Indeterminate | Inability of patient to perform visual field testing, unreliable/uninterpretable visual field test results |