(1) Epilepsy;
(2) Diabetes;
(3) Arthritis which is an obstacle or hindrance to employment or reemployment;
(4) Amputated foot, leg, arm, or hand;
(5) Loss of sight of one or both eyes or a partial loss of uncorrected vision of more than 75 percent bilaterally;
(6) Residual disability from poliomyelitis;
(7) Cerebral palsy;
(8) Multiple sclerosis;
(9) Parkinson's disease;
(10) Cardiovascular disorders;
(11) Tuberculosis;
(12) Intellectual disability, provided the employee's intelligence quotient is such that he falls within the lowest 2 percent of the general population; provided, however, that it shall not be necessary for the employer to know the employee's actual intelligence quotient or actual relative ranking in relation to the intelligence quotient of the general population;
(13) Psychoneurotic disability following confinement for treatment in a recognized medical or mental institution for a period in excess of six months;
(14) Hemophilia;
(15) Sickle cell anemia;
(16) Chronic osteomyelitis;
(17) Ankylosis of major weight-bearing joints;
(18) Hyperinsulism;
(19) Muscular dystrophy;
(20) Total occupational loss of hearing as defined in Code Section 34-9-264;
(21) Compressed air sequelae;
(22) Ruptured intervertebral disc; or
(23) Any permanent condition which, prior to the occurrence of the subsequent injury, constitutes a 20 percent impairment of a foot, leg, hand, or arm, or of the body as a whole.