Source: http://www.ccdisabilities.nic.in/page.php?s=reg&t=def&f=print&p=dop_t
DEFINITIONS OF DISABILITIES: Definitions of categories of disabilities for the purpose of this Office Memorandum are given below:(i) (a) Blindness: “Blindness” refers to a condition where a person suffers from any of the following conditions, namely:-
- total absence of sight; or
- visual acuity not exceeding 6/60 or 20/200(snellen) in the better eye with correcting lenses; or
- limitation of the field of vision subtending an angle of 20 degree or worse;
(b) Low vision: “Person with low vision” means a person with impairment of visual functioning even after treatment or standard refractive correction but who uses or is potentially capable of using vision for the planning or execution of a task with appropriate assistive device.(ii) Hearing Impairment: “Hearing Impairment” means loss of sixty decibels or more in the better ear in the conversational range of frequencies.(iii) (a) Locomotor disability: “Locomotor disability” means disability of the bones, joints or muscles leading to substantial restriction of the movement of the limbs or any form of cerebral palsy.(b) Cerebral Palsy: “Cerebral Palsy” means a group of non-progressive conditions of a person characterised by abnormal motor control posture resulting from brain insult or injuries occurring in the pre-natal, peri-natal or infant period of development.(c) All the cases of orthopaedically handicapped persons would be covered under the category of “locomotor disability or cerebral palsy.”
DEGREE OF DISABILITY FOR RESERVATION: Only such persons would be eligible for reservation in services / posts who suffer from not less than 40 per cent of relevant disability. A person who wants to avail of benefit of reservation would have to submit a Disability Certificate issued by a competent authority .