Contact lens shape dynamics during off-eye dehydration

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The lenses under investigation included: BiotrueONEday, with a water content of 78 per cent, 1-Day Acuvue Moist with a water content of 43 per cent, 1-Day Acuvue TruEye (narafilcon B) with a water content of 48 per cent and Dailies AquaComfort Plus with a water content of 69 per cent. Four -3.00DS power lenses of each product type were allowed to dehydrate in an ambient environment for 20 minutes to observe the physical shape changes over time. All 16 lenses were allowed to dehydrate at the same time. At the time of the experiment, the average indoor temperature was 72°F (22.2°C) with a relative humidity of 30 per cent.