Ask an Eye Doctor and Get an Answer ASAP
The no line bifocals have a more defined area for the reading portion, however it is harder to fine because there are no lines to help you identify it.
you should slowly moves your eyes down until you find the sweet spot of the bifocal.
If it is still blurry or difficulty, take it back to the optical so they can remeasure the focal portion to ensure it is aligned correctly.
If they are still blurry, then take it back to the optical shop so they can remeasure the bifocal portion to make sure they are aligned correctly.