Code of Massachusetts Regulations
540 CMR - REGISTRY OF MOTOR VEHICLES
Title 540 CMR 24.00 - Medical Qualifications For Operators Of Motor Vehicles
Section 24.02 - Definitions
In 540 CMR 24.00, the following definitions apply:
AHA Class I: The American Heart Association (AHA) functional guidelines for classifying heart disease: patients with cardiac disease, but without resulting limitation of physical activity. Ordinary physical activity does not cause undue fatigue, palpitation, dyspnea, or anginal pain.
AHA Class II: The American Heart Association (AHA) functional guidelines for classifying heart disease: patients with cardiac disease resulting in slight limitation of physical activity. They are comfortable at rest. Ordinary physical activity results in fatigue, palpitation, dyspnea, or anginal pain.
AHA Class III: The American Heart Association (AHA) functional guidelines for classifying heart disease: patients with cardiac disease resulting in marked limitation of physical activity. They are comfortable at rest. Less than ordinary activity causes fatigue, palpitation, dyspnea, or anginal pain.
AHA Class IV: The American Heart Association (AHA) functional guidelines for classifying heart disease: patients with cardiac disease resulting in inability to carry on any physical activity without discomfort. Symptoms of heart failure or the anginal syndrome may be present even at rest. If any physical activity is undertaken, discomfort is increased.
Bioptic Telescopic Lens: A particular system of lenses which uses magnification as the principal means of obtaining visual acuity for one eye. Such system must be afocal and suited for optical infinity.
Carrier Lens: A lens in which a telescopic device is mounted. It may or may not have a refractive correction.
Corrective Lens: A lens which corrects a refractive condition in the eye. A corrective lens, as used in 540 CMR 24.00, does not include bioptic telescopic lenses (except that a "corrective lens (B)" restriction must be imposed on any license or learner's permit issued to a person using a bioptic telescopic lens).
Episode: A seizure, syncope, or any other form of altered consciousness which will or may affect the safe operation of a motor vehicle.
FEV-1: The forced expiratory volume, in liters, of O2 that a person can breathe out in one second. This amount is usually expressed in liters with 4.00 liters representing the normal amount.
Functional Impairment: Any symptom of a disease or medical condition that results in full or partial decrease in any or several sensory or motor functions including but not limited to peripheral sensation of the extremities, strength, flexibility, motor planning and coordination.
Health Care Provider: A registered nurse, licensed practical nurse, physician, physician assistant, psychologist, occupational therapist, physical therapist, optometrist, ophthalmologist, osteopath or podiatrist who is a licensed health care provider under M.G.L. c. 112.
Physician: A medical doctor who is licensed to practice in the Commonwealth of Massachusetts.
O2 Saturation Level: The amount of oxygen "O2" that one vial of blood contains. This amount is usually described as a percentage with 100% representing the normal amount.
Self-care: The ability to perform the functions of daily living and of survival, such as feeding oneself, toilet functions, bathing, dressing, and so on.
