Regarding the published article, "20-20-20 Rule: Are These Numbers Justified," 1 I wish to respond.Please note that I was the creator of the "20-20-20 Rule" in the late 1990s, and it was a part of the "3-B" approach for computer vision syndrome. The 3-B's referred to Blink, Breathe, and Break, of which the 20-20-20 rule was noted as a way to remember to take breaks.I would refer you to a comprehensive article by Dr. Brian Chou, who documented the development of the "rule" (https://www. optometrytimes.com/view/deconstructing-20-20-20-rule-digitaleye-strain). 2 I originally recommended "microbreaks," "minibreaks," and "macrobreaks," but because patients can relate to "20/20" from eye doctors, I decided to make it easier for people to remember. These mnemonics were developed for media interviews I was doing regarding eyestrain and computer use. The interviewer always asked for something "practical" that the viewer could easily remember. There was a study on "computer use" that recommended that "shorter, more frequent breaks were more beneficial than waiting for longer periods" (this was not specific to eye strain). In addition, managers hate to tell their employees to "take longer breaks"!