If you use a CPAP machine then you likely have experienced 'CPAP dry eye'. The common symptomology is patients with scratchy, irritated eyes on waking if mask fit is not perfect or a nighttime shift occurs.
CPAP is not a real 'diagnosis'... but certainly a common clinical observation.
Both are non-preserved and when used just before bed, prevent much of the overnight evaporation that causes the morning discomfort.
Both gel caused some blurred vision so only evening use is recommended.
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