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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Ophthalmology. 2019 Aug 29;127(2):167–176. doi: 10.1016/j.ophtha.2019.08.027

Table 3.

Amount of SS decrease needed to produce a 5 micron or one median within eye SD (3.21 microns) decrease in ΔRNFL (Observed – Predicted) stratified by severity of glaucoma and the presence or absence of artifact.

Artifact Severity of Glaucoma Amount of Signal Strength
Decrease Needed to
Produce a 5 Micron
Change in ΔRNFL		 Amount of Signal Strength
Decrease Needed to
Produce the Median
Within-Eye Standard
Deviation of ΔRNFL
Absent Mild 7.02 4.79
Moderate 5.68 4.28
Severe 4.00 2.5
Present Mild <1 <1
Moderate <1 <1
Severe <1 <1

SS: Signal Strength, RNFL: Retinal Nerve Fiber Layer