Acceptance of different multifocal contact lenses depending on the binocular findings.

In a clinical study the subjective acceptance as well as the quality of different visual functions was examined during the wearing of three multifocal lenses (Ciba Spectrum Bifocal, Allergan Echelon, and Essilor Variations). Ten subjects wore each of the 3 contact lens types for a period of 12 to 21 days after the binocular finding (bicentral or disparate vision within the Panum's area); further functions such as contrast or scotopic vision were qualified and/or quantified in a basic examination. All subjects (N = 5) with the binocular finding orthophoria/motorcompensated heterophoria preferred the Ciba Spectrum Bifocal. Furthermore, all visual functions of the 10 test persons were clearly reduced with all 3 multifocal contact lenses. A correlation between the "preferred contact lens and the detailed subjective acceptance" and/or the "subjective acceptance and the functional measurements" could not be proven as statistically significant.