Figure 1: Sample Selection Strategy.

⁰ coverage ends at the date of deaths if beneficiary died

¹ presence of a procedure code for cataract surgery and/or a diagnosis code for pseudophakia or aphakia present in the first 3 years of a given beneficiary’s enrollment period (“lookback period”) and/or missing value associated with key variables

² based on provider type classification

³ presence of a dementia diagnosis recorded during a beneficiary’s lookback period

⁴ presence of a new dementia diagnosis first recorded after the lookback period but prior to any eye care provider visit

⁵ presence of a new dementia diagnosis first recorded after the lookback period but prior to any cataract surgery

⁶ presence of a new dementia diagnosis first recorded after the lookback period but prior to end of observed enrollment