. 2023 Jun 15;37(18):3813–3818. doi: 10.1038/s41433-023-02622-9

Table 2.

Criteria for GON Grading.

Classification	Pathologic features
Non-GON	None of the GON appearance
Suspected GON	At least 2 conditions positive: 1. 0.7 ≤ Vertical cup-to-disc Ratio ≤ 0.85; 2. Rim width ≤0.1-disc diameter; 3. General rim thinning ≥60° or localized rim thinning <60° in the superior region or inferior region; 4. Retinal nerve fiber layer defects; 5. Splinter hemorrhages on disc; 6. β peripapillary atrophy.
Confirmed GON	Any of the following conditions: 1. Vertical cup-to-disc Ratio ≥ 0.85; 2. Retinal nerve fiber layer defects correspond with the thinning area of rim or notches.

Classification

Pathologic features

Non-GON

None of the GON appearance

Suspected GON

At least 2 conditions positive:

1. 0.7 ≤ Vertical cup-to-disc Ratio ≤ 0.85;

2. Rim width ≤0.1-disc diameter;

3. General rim thinning ≥60° or localized rim thinning <60° in the superior region or inferior region;

4. Retinal nerve fiber layer defects;

5. Splinter hemorrhages on disc;

6. β peripapillary atrophy.

Confirmed GON

Any of the following conditions:

1. Vertical cup-to-disc Ratio ≥ 0.85;

2. Retinal nerve fiber layer defects correspond with the thinning area of rim or notches.

GON glaucomatous optic neuropathy.