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. Author manuscript; available in PMC: 2021 Aug 21.
Published in final edited form as: Ophthalmology. 2018 Sep 29;126(6):856–865. doi: 10.1016/j.ophtha.2018.09.039

Figure 1.

Figure 1.

Representative dark adaptation (DA) raw data for an individual participant at baseline and 4 years (left). All rod intercept time (RIT) values measured at study visits over 4 years are plotted, and the slope of the linear regression performed defines “slope RIT” (right). This measure (slope RIT) is used to represent the rate of change in RIT of a given study eye.