Feasibility Research of Determined Oxygen Permeability of Finished Soft Contact Lens / 中国医疗器械杂志

ABSTRACT

<p><b>OBJECTIVE</b>A method for determined oxygen permeability (Dk) of finished soft contact lens.</p><p><b>METHODS</b>Oxygen permeability(Dk) of 10 group finished soft contact lens was determined by polarographic method, and the values were linearly calibrated using the measured and established Dk values of the specified reference materials.</p><p><b>RESULTS</b>Only one Dk value fell outside of the requirement of GB 11417.3-2012 tolerance for Dk (± 20%).</p><p><b>CONCLUSION</b>It is great practicability when determined the oxygen permeability (Dk) of finished soft contact lens by polarographic method which were linearly calibrated using the measured and established Dk values of the specified equal thickness reference materials without the measured lens customized 4 different thickness.</p>