| CPC A61N 5/0622 (2013.01) [A61B 5/0036 (2018.08); A61B 5/16 (2013.01); A61B 5/377 (2021.01); A61B 5/378 (2021.01); A61B 5/38 (2021.01); A61B 5/4088 (2013.01); A61B 5/4836 (2013.01); A61M 21/00 (2013.01); A61N 1/0456 (2013.01); A61N 1/36025 (2013.01); A61N 1/36036 (2017.08); A61N 1/36082 (2013.01); A61N 1/36092 (2013.01); A61N 1/36132 (2013.01); A61N 5/0618 (2013.01); G02C 11/10 (2013.01); H05B 47/105 (2020.01); A61B 3/113 (2013.01); A61B 5/024 (2013.01); A61B 5/05 (2013.01); A61B 5/163 (2017.08); A61B 5/168 (2013.01); A61B 5/375 (2021.01); A61B 5/398 (2021.01); A61B 5/4848 (2013.01); A61B 5/6803 (2013.01); A61M 2021/0027 (2013.01); A61M 2021/0044 (2013.01); A61M 2021/0072 (2013.01); A61M 2205/3375 (2013.01); A61N 1/0551 (2013.01); A61N 2005/0626 (2013.01); A61N 2005/0627 (2013.01); A61N 2005/0629 (2013.01); A61N 2005/0648 (2013.01); A61N 2005/0652 (2013.01); A61N 2005/0659 (2013.01); A61N 2005/0661 (2013.01); A61N 2005/0662 (2013.01); A61N 2005/0663 (2013.01); A61N 2005/0667 (2013.01); G02C 2200/10 (2013.01)] | 16 Claims |

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1. A method for treating mild cognitive impairment or Alzheimer's disease or benefiting a cognitive function of a brain of a subject in need thereof via a system, the method comprising:
(a) using a first light source to generate a first light pulse and using a second light source to generate a second light pulse, wherein said first light source or said second light source comprises a filtering component configured to selectively transmit a portion of an initial spectral range of the first light pulse or the second light pulse;
(b) determining an attention level of the subject by:
(i) performing eye tracking of an eye of the subject via a feedback sensor; or
(ii) determining an orientation of at least one of a head or a body of the subject; and
(c) emitting the first light pulse and the second light pulse to the subject, wherein the first light pulse and the second light pulse are emitted at a 40 Hertz (Hz) frequency, thereby slowing a progression of mild cognitive impairment or Alzheimer's disease, or thereby benefiting the cognitive state or function of the brain of the subject; wherein the determining the attention level of the subject comprises comparing, via a feedback monitor, a direction or a movement of an eye of the subject to a historical eye direction or an eye movement of the subject based on a threshold.
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