Recent FDA-Sponsored Research of a PHMB MPS

Drs. Brujic and Kading discuss the recently released FDA-sponsored research on a multipurpose contact lens solution containing polyhexamethylene biguanide or PHMB (0.0001%, six-hour soak). In a laboratory test over time, some lens materials soaked in a PHMB solution significantly reduced the concentration of PHMB and therefore lessened the residual solution's anti-microbial and anti-fungal activity. This shows the importance of understanding lens/solution interactions and, therefore, further research is needed to help eyecare professionals understand the impact of the findings.