Indoor Progressive design:

As its name suggests, Indoor Progressive design is for those who spend more time using their eye indoors, sometimes called soft design. The feature of this design is that near view area is great than far view area, mainly suitable for people working mostly indoors, such as engineers and office staff. As shown in the graph, the most important feature of the Free4D design is the biggest cylinder spot astigmatism at the top left of effective optical power area, with max cylinder of astigmatism less than 80% ADD value and a wider channel and astigmatism less than 0.02D in near view.