Fig. 2

Scatter plot showing the relationship between the timing of AGVI (Ahmed glaucoma valve implantation) and visual outcomes. Groups 1 and 2 were categorized according to the treatment response of initial non-surgical treatment for increased IOP. In group 1, the patients with an unfavorable visual outcome are concentrated in the intervals between NVG diagnosis and AGVI for a week or more (dotted box). In group 2, no clear association was observed between vision prognosis and timing of AGVI