Benefits of INDEX pen from positive papers from experts and links

From Reliable Sources "Handwriting requires the motor coordination of multiple joints in the hand, wrist, elbow, and shoulder to form letters and to arrange them on the page. Holding the pen and guiding it across paper depends mostly upon sensory information from skin, joints and muscles of the hand and this adjusts movement to changes in the friction between pen and paper. With practice and familiarity, handwriting becomes highly automated using motor programs stored in motor memory. Compared to other complex motor skills handwriting is far less dependent on a moment-to-moment visual guidance".

Indexpen demo

Indexpen Ink Refill replacement

The Question is WHY?
From American Journal of Occupational Therapy