People who have abnormal vision, should be at the proper spacing and to look at the screen. By being too far away from the head and the eyes of about 30 centimeters.
People with visual impairment. Glasses should have access to the eyes and the distance to a screen. By staying away from the head and eyes, about 30 cm.
People with eye problems is wrong. There should be a glasses along with the sight and appropriate to the stage to look the screen. By staying away from the head and eyes around 30 cm.