Manual
Gonioscopy & angle grading
Glaucoma
Gonioscopy & angle grading
Shaffer grading and landmarks.
Landmarks (posterior → anterior): ciliary body band, scleral spur, trabecular meshwork (pigmented posterior part), Schwalbe line.
| Shaffer | Angle width | Structures seen |
|---|---|---|
| 4 | 35–45° | CBB visible |
| 3 | 25–35° | Scleral spur |
| 2 | 20° | TM — closure possible |
| 1 | 10° | Schwalbe line only — closure likely |
| 0 | Closed | None |
Educational summary — follow local protocols and current guidelines.