Section 8. Permanent total disability benefits

In  the  case of total
  disability adjudged to be permanent the volunteer firefighter  shall  be
  paid  four hundred dollars for each week during the continuance thereof.
  Permanent total disability, within the meaning of  this  section,  shall
  exist only if the earning capacity of the volunteer firefighter has been
  lost  permanently  and  totally as the result of the injury. The loss of
  both hands, or both arms, or both feet, or both legs, or both  eyes,  or
  any  two  thereof,  shall,  in  the  absence  of conclusive proof to the
  contrary, constitute permanent total disability, but in all other  cases
  permanent  total  disability  shall be determined in accordance with the
  facts. Notwithstanding any other provisions of this chapter, an  injured
  volunteer  firefighter  disabled due to the loss or total loss of use of
  both eyes, or both hands, or both arms, or both feet, or both  legs,  or
  any  two  thereof shall not suffer any diminution of such weekly benefit
  by engaging in  business  or  employment  provided  his  or  her  weekly
  earnings  or  wages,  when combined with his or her weekly benefit shall
  not be in excess of six hundred dollars; and further provided  that  the
  application  of  this  section shall not result in reduction of benefits
  which an injured volunteer firefighter who is disabled due to  the  loss
  or  total loss of use of both eyes, or both hands, or both arms, or both
  feet, or both legs, or any two thereof would otherwise  be  entitled  to
  under any other provisions of this article.