Assessment of dry eye signs and symptoms and ocular tolerance of a preservative-free lacrimal substitute (Hylabak<sup>&reg;</sup>) versus a preserved lacrimal substitute (Systane<sup>&reg;</sup>) used for 3 months in patients after LASIK

Original Research

Assessment of dry eye signs and symptoms and ocular tolerance of a preservative-free lacrimal substitute (Hylabak^®) versus a preserved lacrimal substitute (Systane^®) used for 3 months in patients after LASIK

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