Subject to this Act, a person shall be entitled to pension (in this Act referred to as "blind pension") where -
(a) the person has attained the age of 18 years but has not attained pensionable age,
(b) the reason for the person's incapacity to perform any insurable employment or insurable self-employment for which eyesight is essential or to continue his or her ordinary occupation is as a direct result of his or her blindness and for no other reason,
(bb) were it not for this incapacity he or she would be available to work in insurable employment or insurable self-employment,
(c) the means of the person as calculated in accordance with the Rules contained in Part 5 of Schedule 3 do not exceed the appropriate highest amount of means at which pension may be paid to that person in accordance with section 161B, and
(d) the person is habitually resident in the State.