Harm of eye protection pen in frontal posture

Excuse me, are you asking about the harm of Lin's eye protection pen? This pen is harmless so far.

Lin Eye Protection Pen is a magical smart pen specially developed for students, and it is the first high-tech patented product at home and abroad to correct students' bad pen holding posture and writing sitting posture. It integrates optics, electronics and machinery, and consists of more than 70 high-tech components such as standardized pen holder, all-angle electronic eye, intelligent chip and central processing unit.

This pen is specially designed for students to "prevent myopia, hunchback and write easily". It has a standardized pen-holding groove, which can standardize the child's pen-holding posture; In the process of writing, the child's sitting posture is incorrect, and his eyes are too close to the desktop. The built-in all-angle electronic eye will automatically transmit information to the central processor, so that the mechanical parts are linked and the pen tip automatically retracts, forcing students to write; When students adjust (correct sitting posture), the pen tip will automatically extend again.