The proportion of distance, intermediate and near visual fields preferred by patients for the best vision performance. The design for each prescription range has been adjusted to ensure that myopes, emmetropes and hyperopes all receive equally expansive fields of view at every distance. The viewing zones of right and left lenses match precisely. The right correction is in the right place, making it easier to focus. The combination of technologies and benefits described above can only be found in Percepta.
Some manufacturers design their progressive lenses to provide wide viewing zones.
Others choose to optimize performance by emphasizing binocular vision in the design. Only Percepta combines the three technologies, and their associated benefits, in one lens. To fully appreciate the design of Percepta, we would need to show 60 different plots of surface astigmatism, and 60 plots of mean power. Even with these plots, it would be difficult or impossible to appreciate the binocular vision benefits provided by Zone Congruence. Percepta is available to any eye care professional but sold directly to wholesale optical laboratories only.