1. Contact Lens Spectrum Millennium Report.;Barr;Contact Lens Spectrum,2000
2. Visual performance of a multi-zone bifocal and a progressive multifocal contact lens.;Guillon;CLAO J,2002
3. Contrast sensitivity with optically decentered simultaneous-vision bifocal soft contact lenses and conventional soft contact lenses.;Yanai;J Jpn Contact Lens Soc,2001
4. Contrast acuity with multifocal soft contact lenses and single-vision soft contact lenses.;Ueda;J Jpn Contact Lens Soc,2002
5. Contrast sensitivity with bifocal hard contact lenses.;Suzaki;J Jpn Contact Lens Soc,2005