1. Andrasko GJ, Ryen KA (2007) A series of evaluations of MPS and silicone hydrogel lens combinations. Rev Cornea Contact Lenses (March):36–42
2. Andrasko G, Ryen K (2008) Corneal staining and comfort observed with traditional and silicone hydrogel lenses and multipurpose solution combinations. Optometry 79(8):444–454
3. Andrasko GJ (2010–2011): Tab. (19.08.2011), Fotos: Homepage: http://www.staininggrid.com/
4. Barrett RP, Mowrey-McKee M, Zhang Y, Hazlett LD (2005) Punctate fluorescein corneal staining observed using polyhexamethylene biguanide containing disinfecting solution not indicative of corneal surface damage. Invest Ophthalmol Vis Sci: 46
5. Brennan NA (2005) Corneal oxygenation during contact lens wear: comparison of diffusion and EOP-based flux models. Clin Exp Optom 88:103–108