Abstract
PurposeTo compare the effects of a soaking objective lens into warm saline and a corneal coating with ophthalmicviscoelastic devices (OVDs) for preventing condensation during vitrectomy with noncontact wide‐angle viewingsystems (WAVs).MethodsFour experiments were performed with a noncontact WAVs. First, we explored the condensation timeaccording to the distance between cornea and objective lens. Second, after coating the dispersive ophthalmicviscoelastic devices (OVDs) on cornea surface, we rechecked the condensation time in the same manner. Third, we repeated experiment after soaking the objective lens in warm saline. Before 3rd experiment, to determine the optimalsoaking time, we checked the temperature changes after soaking lens for 1, 5, 10, 15, and 20 min.ResultsThe difference in temperature of the lenses soaked for 1 and 5 min was not statistically significant. Onthe other hand, the lenses soaked for 10, 15 and 20 min showed statistically significant difference compared withthe lenses soaked for 1 min in the saline. There was no difference in the condensation time between control andOVDs coating group at 1, 3 and 5 mm distance from the corneal surface (p = .068, p = .051 and p = .063 respectively).However, the condensation time of the 1 min warm saline soaking group was higher than that of the control at 1, 3and 5 mm distance from the corneal surface (p = .043, p = .041 and p = .043 respectively).ConclusionsA corneal coating with OVDs was not much effective in delaying condensation time while warm salinesoaked lens proved to be simple and effective to get clear surgical view for a long enough time.
Published Version
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