. 2019 Dec 11;9:18886. doi: 10.1038/s41598-019-55345-x

Table 1.

Sample size requirements for identifying statistically significant treatment effects using visual field (VF) or optical coherence tomography (OCT) in alone or when combined.

New Treatment Effect	Sample Size Required Per Group
New Treatment Effect	VF Only	OCT Only	VF and OCT
20%	647	669	449
30%	276	285	189
40%	146	148	98
50%	86	91	59