Systematic Assessment of Clinical Methods to Diagnose and Monitor Diabetic Retinal Neuropathy

Table 5

Number of studies with perimetry investigations demonstrating evidence of change in pre- or early diabetic retinopathy.

Perimetry	Compelling	Moderate	Weak	No evidence despite investigation
Perimetry	18	10	2	1
Flicker perimetry	9	0	1	0
SWAP	17	2	1	0

Perimetry in general, and particularly 30 Hz flicker, and SWAP have generally very compelling or indicative evidence for demonstration of retinal neuropathic changes as a proportion of total studies addressing these modalities.