Blue light-filtering contact lens parameter changes after multi-purpose solution cleaning.
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2012
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Abstract
Purpose:
The aim of the present study was to evaluate the physics compatibility properties of All Clean® multipurpose disinfection solution to blue light-filtering contact lens, based on the International Organization for Standardization (ISO) 18369-3:2006 guidelines.
Methods:
A self-controlled trial was carried out in series of 10 disposable non blue light-filtering contact lenses (Hema 55%WC) and in series of 10 disposable blue light-filtering contact lens (Profilcon A 52%WC) to evaluate parameter changes after cleaning with All Clean Multi-purpose Solution Cleaning. Each contact lens was cleaned for 30 times. After the thorough cleaning process, total diameter (D), power refraction (P), UVB transmittance (TUVB), UVA transmittance (TUVA) and visible transmittance (TVIS) were measured. The parameters were statistically analyzed to evaluate the changes.
Results/Data:
There were significant changes in the D, TUVA and TVIS of non blue light-filtering contact lens and changes in P of blue light-filtering contact lens. After the cleaning process with the All Clean® solution, physical properties of contact lenses Hema 55%WC changed as following: D=-0.02±0.2mm (p=0.008), P=0.09±0.13D (p=0.07), TUVB=1±2% (p=0.6), TUVA=3±2% (p=0.0002) y TVIS=1±1% (p=0.02). Contact lenses Profilcon A 52%WC suffered the next variations in their physical properties: D=-0±0.2mm (p=0.1), P=0.23±0.25D (p=0.01), TUVB=1±2% (p=0.7), TUVA=1±2% (p=0.9) y TVIS=0±4% (p=0.3).
Conclusions:
Once the cleaning process with All Clean® solution is done, a statistically significant variation related to physical parameters was observed for both materials in the contact lenses. However, these parameter changes were not clinically significant because the changes were still in the tolerance range set by ISO (International Organization of Standardization). All Clean® multipurpose contact lens solution cleaning proved to maintain lens physics compatibility properties within its acceptable range.