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Title I Technical Assistance Manual

2.1(a) An Impairment that Substantially Limits Major Life Activities

The first part of this definition has three major subparts that further define who is and who is not protected by the ADA.

ETA Editor's Note

In the original document, section (a) is listed under section 2.2 but erroneously numbered as 2.1(a).

(i) A Physical or Mental Impairment

A physical impairment is defined by the ADA as:

"[A]ny physiological disorder, or condition, cosmetic disfigurement, or anatomical loss affecting one or more of the following body systems: neurological, musculoskeletal, special sense organs, respiratory (including speech organs), cardiovascular, reproductive, digestive, genito-urinary, hemic and lymphatic, skin, and endocrine."

A mental impairment is defined by the ADA as:

"[A]ny mental or psychological disorder, such as mental retardation, organic brain syndrome, emotional or mental illness, and specific learning disabilities."

Neither the statute nor EEOC regulations list all diseases or conditions that make up "physical or mental impairments," because it would be impossible to provide a comprehensive list, given the variety of possible impairments.

A person's impairment is determined without regard to any medication or assistive device that s/he may use.

For example: A person who has epilepsy and uses medication to control seizures, or a person who walks with an artificial leg would be considered to have an impairment, even if the medicine or prosthesis reduces the impact of that impairment.

An impairment under the ADA is a physiological or mental disorder; simple physical characteristics, therefore, such as eye or hair color, lefthandedness, or height or weight within a normal range, are not impairments. A physical condition that is not the result of a physiological disorder, such as pregnancy, or a predisposition to a certain disease would not be an impairment. Similarly, personality traits such as poor judgment, quick temper or irresponsible behavior, are not themselves impairments. Environmental, cultural, or economic disadvantages, such as lack of education or a prison record also are not impairments.

For example: A person who cannot read due to dyslexia is an individual with a disability because dyslexia, which is a learning disability, is an impairment. But a person who cannot read because she dropped out of school is not an individual with a disability, because lack of education is not an impairment.

"Stress" and "depression" are conditions that may or may not be considered impairments, depending on whether these conditions result from a documented physiological or mental disorder.

For example: A person suffering from general "stress" because of job or personal life pressures would not be considered to have an impairment. However, if this person is diagnosed by a psychiatrist as having an identifiable stress disorder, s/he would have an impairment that may be a disability.

A person who has a contagious disease has an impairment. For example, infection with the Human Immunodeficiency Virus (HIV) is an impairment. The Supreme Court has ruled that an individual with tuberculosis which affected her respiratory system had an impairment under Section 504 of the Rehabilitation Act<1>. However, although a person who has a contagious disease may be covered by the ADA, an employer would not have to hire or retain a person whose contagious disease posed a direct threat to health or safety, if no reasonable accommodation could reduce or eliminate this threat. (See Health and Safety Standards, Chapter IV.)

(ii) Major Life Activities

To be a disability covered by the ADA, an impairment must substantially limit one or more major life activities. These are activities that an average person can perform with little or no difficulty. Examples are:

  • walking

  • seeing

  • speaking

  • hearing

  • breathing

  • learning

  • performing manual tasks

  • caring for oneself

  • working

These are examples only. Other activities such as sitting, standing, lifting, or reading are also major life activities.

(iii) Substantially Limits

An impairment is only a "disability" under the ADA if it substantially limits one or more major life activities. An individual must be unable to perform, or be significantly limited in the ability to perform, an activity compared to an average person in the general population.

The regulations provide three factors to consider in determining whether a person's impairment substantially limits a major life activity.

  • its nature and severity;

  • how long it will last or is expected to last;

  • its permanent or long term impact, or expected impact.

These factors must be considered because, generally, it is not the name of an impairment or a condition that determines whether a person is protected by the ADA, but rather the effect of an impairment or condition on the life of a particular person. Some impairments, such as blindness, deafness, HIV infection or AIDS, are by their nature substantially limiting, but many other impairments may be disabling for some individuals but not for others, depending on the impact on their activities.

For example: Although cerebral palsy frequently significantly restricts major life activities such as speaking, walking and performing manual tasks, an individual with very mild cerebral palsy that only slightly interferes with his ability to speak and has no significant impact on other major life activities is not an individual with a disability under this part of the definition.

The determination as to whether an individual is substantially limited must always be based on the effect of an impairment on that individual's life activities.

For example: An individual who had been employed as a receptionist-clerk sustained a back injury that resulted in considerable pain. The pain permanently restricted her ability to walk, sit, stand, drive, care for her home, and engage in recreational activities. Another individual who had been employed as a general laborer had sustained a back injury, but was able to continue an active life, including recreational sports, and had obtained a new position as a security guard. The first individual was found by a court to be an individual with a disability; the second individual was found not significantly restricted in any major life activity, and therefore not an individual with a disability.

Sometimes, an individual may have two or more impairments, neither of which by itself substantially limits a major life activity, but that together have this effect. In such a situation, the individual has a disability.

For example: A person has a mild form of arthritis in her wrists and hands and a mild form of osteoporosis. Neither impairment by itself substantially limits a major life activity. Together, however, these impairments significantly restrict her ability to lift and perform manual tasks. She has a disability under the ADA.

Temporary Impairments

Employers frequently ask whether "temporary disabilities" are covered by the ADA. How long an impairment lasts is a factor to be considered, but does not by itself determine whether a person has a disability under the ADA. The basic question is whether an impairment "substantially limits" one or more major life activities. This question is answered by looking at the extent, duration, and impact of the impairment. Temporary, non-chronic impairments that do not last for a long time and that have little or no long term impact usually are not disabilities.

For example: Broken limbs, sprains, concussions, appendicitis, common colds, or influenza generally would not be disabilities. A broken leg that heals normally within a few months, for example, would not be a disability under the ADA. However, if a broken leg took significantly longer than the normal healing period to heal, and during this period the individual could not walk, s/he would be considered to have a disability. Or, if the leg did not heal properly, and resulted in a permanent impairment that significantly restricted walking or other major life activities, s/he would be considered to have a disability.

Substantially Limited in Working

It is not necessary to consider if a person is substantially limited in the major life activity of "working" if the person is substantially limited in any other major life activity.

For example: If a person is substantially limited in seeing, hearing, or walking, there is no need to consider whether the person is also substantially limited in working.

In general, a person will not be considered to be substantially limited in working if s/he is substantially limited in performing only a particular job for one employer, or unable to perform a very specialized job in a particular field.

For example: A person who cannot qualify as a commercial airline pilot because of a minor vision impairment, but who could qualify as a co-pilot or a pilot for a courier service, would not be considered substantially limited in working just because he could not perform a particular job. Similarly, a baseball pitcher who develops a bad elbow and can no longer pitch would not be substantially limited in working because he could no longer perform the specialized job of pitching in baseball.

But a person need not be totally unable to work in order to be considered substantially limited in working. The person must be significantly restricted in the ability to perform either a class of jobs or a broad range of jobs in various classes, compared to an average person with similar training, skills, and abilities.

The regulations provide factors to help determine whether a person is substantially limited in working. These include:

  • the type of job from which the individual has been disqualified because of the impairment;

  • the geographical area in which the person may reasonably expect to find a job;

  • the number and types of jobs using similar training, knowledge, skill, or abilities from which the individual is disqualified within the geographical area; and/or

  • the number and types of other jobs in the area that do not involve similar training, knowledge, skill, or abilities from which the individual also is disqualified because of the impairment.

For example: A person would be considered significantly restricted in a "class of jobs" if a back condition prevents him from working in any heavy labor job. A person would be considered significantly limited in the ability to perform "a broad range of jobs in various classes" if she has an allergy to a substance found in most high-rise office buildings in the geographic area in which she could reasonably seek work, and the allergy caused extreme difficulty in breathing. In this case, she would be substantially limited in the ability to perform the many different kinds of jobs that are performed in high-rise buildings. By contrast, a person who has a severe allergy to a substance in the particular office in which she works, but who is able to work in many other offices that do not contain this substance, would not be significantly restricted in working.

For example: A computer programmer develops a vision impairment that does not substantially limit her ability to see, but because of poor contrast is unable to distinguish print on computer screens. Her impairment prevents her from working as a computer operator, programmer, instructor, or systems analyst. She is substantially limited in working, because her impairment prevents her from working in the class of jobs requiring use of a computer.

In assessing the "number" of jobs from which a person might be excluded by an impairment, the regulations make clear that it is only necessary to indicate an approximate number of jobs from which an individual would be excluded (such as "few," "many," "most"), compared to an average person with similar training, skills and abilities, to show that the individual would be significantly limited in working.

Specific Exclusions

A person who currently illegally uses drugs is not protected by the ADA , as an "individual with a disability", when an employer acts on the basis of such use. However, former drug addicts who have been successfully rehabilitated may be protected by the Act. (See Chapter VIII). (See also discussion below of a person "regarded as" a drug addict.)

Homosexuality and bisexuality are not impairments and therefore are not disabilities covered by the ADA. The Act also states that the term "disability" does not include the following sexual and behavioral disorders:

  • transvestism, transsexualism, pedophilia, exhibitionism, voyeurism, gender identity disorders not resulting from physical impairments, or other sexual behavior disorders;

  • compulsive gambling, kleptomania, or pyromania; or

  • psychoactive substance use disorders resulting from current illegal use of drugs.

The discussion so far has focused on the first part of the definition of an "individual with a disability," which protects people who currently have an impairment that substantially limits a major life activity. The second and third parts of the definition protect people who may or may not actually have such an impairment, but who may be subject to discrimination because they have a record of or are regarded as having such an impairment.

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