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KMID : 1011420200250020119
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Journal of Korean Ophthalmic Optics Society
2020 Volume.25 No. 2 p.119 ~ p.130
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Changes in the Parameters of Soft Contact Lenses by Exposure to Different Solutions in Daily Life
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Lee Suk-Gee
Ahn Sang-Ho
Kim So-Ra
Park Mi-Jung
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Abstract
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Purpose: The present study aimed to survey the different types of solutions likely to be used for the daily care of soft contact lenses (hereinafter soft lenses), and to identify the changes in the parameters of soft lenses when exposed to these fluids.
Methods: The different types of solutions were surveyed in a total of 357 people. The changes in six soft lenses made of different materials, with wetting agent and the presence or absence of pigmentation, were evaluated by measuring the refractive power, total diameter, base curve, water content, and thickness after exposure to 5 different types of solutions for 24 hours. Based on the standards of the Korea Food and Drug Safety Ministry (KFDA), the extent of changes in the parameters (outside or within the allowable range) and the statistical significance of these changes were assessed.
Results: According to the survey results, 108 respondents (34%) kept soft lenses in solution(s) other than the multi-purpose solution (MPS). In addition, 78% of these (84/108) had experienced side-effects. The parameters of soft lenses exposed to different solutions varied depending on the lens material, pigmentation, and addition of a wetting agent; the changes were not consistent. The soft lenses exposed to tap water and artificial tears showed statistically significant changes in the parameters, and some of these changes were outside the allowable range; however, the changes in parameters of soft lenses exposed to 2 MPS and saline were not significant. In addition, the type of lens material also affected the degree of change in parameters of soft lenses when exposed to solutions; however, the addition of pigments to the material did not affect this change.
Conclusions: The change in lens parameters were affected by exposure to various solutions. Therefore, an education on proper solution use should be provided to lens wearers, in order to prevent the side effects caused by wearing soft lenses with altered parameters.
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KEYWORD
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Soft Contact Lenses, Lens parameters, Daily Life, Actual State of Use, Lens Management Solutions
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