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. 2020 Jun 18;14:1651–1663. doi: 10.2147/OPTH.S258081

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© 2020 Fogagnolo et al.

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Flow of the study design. After verifying eligibility at V1, patients received washout from lubricating treatments until V2. They then entered two 6-week periods. The first product was randomly assigned at V2, the second at V4. V3 and V5 were the intermediate visits of the first and second 6-week period, respectively. No washout occurred between V4 and V5.