Highlights
- •Visual acuity is stabilized 10 minutes after soft contact lens insertion.
- •in vivo wettability is stabilized 10 minutes after soft contact lens insertion.
- •Comfort keeps increasing during 30 minutes after soft contact lens insertion.
Abstract
Purpose
To evaluate comfort, visual function, and in vivo wettability after the insertion of hydrogel and silicone hydrogel contact lenses
for a better understanding of how long practitioners should wait for the initial evaluation
of soft contact lenses.
Methods
A short-term prospective, contralateral, randomized, and participant-masked study
was carried out. Twenty healthy participants (25.4 ± 2.6 years) were evaluated after
the insertion of two different soft contact lenses at different times (1, 5, 10, 20,
30 min). Ocufilcon D (hydrogel) and Somofilcon A (silicone hydrogel) contact lenses
were randomly assigned to both eyes of the same participant. Comfort, visual function
under photopic conditions in terms of high-contrast visual acuity, low-contrast visual
acuity, contrast sensitivity, and in vivo wettability were measured.
Results
There was an increase in comfort (p < 0.001), high-contrast visual acuity (p < 0.05),
and contrast sensitivity (p < 0.001, only with silicone hydrogel) directly related
to time after contact lens insertion. Besides, in vivo wettability suffered a statistically significant deterioration directly related to
time with both contact lenses (p < 0.05). Except for comfort and contrast sensitivity,
all the parameters stabilized their values 10 min after the insertion of both soft
contact lenses. Additionally, in vivo wettability and visual acuity differences were found between hydrogel and silicone
hydrogel contact lenses (p < 0.05).
Conclusions
It would be possible to properly evaluate high-contrast visual acuity, low-contrast
visual acuity, and in vivo wettability 10 min after the insertion of both soft contact lenses.
Keywords
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Article info
Publication history
Published online: August 06, 2021
Accepted:
August 1,
2021
Received in revised form:
July 20,
2021
Received:
February 24,
2021
Identification
Copyright
© 2021 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
