Mich. Comp. Laws § 257.19a

Sec. 19a. "Disabled person" or "person with disabilities" means a person who is determined by a physician, a physician assistant, or an optometrist as specifically provided in this section licensed to practice in this state to have 1 or more of the following physical characteristics: (a) Blindness as determined by an optometrist, a physician, or a physician assistant. (b) Inability to walk more than 200 feet without having to stop and rest. (c) Inability to do both of the following: (i) Use 1 or both legs or feet. (ii) Walk without the use of a wheelchair, walker, crutch, brace, prosthetic, or other device, or without the assistance of another person. (d) A lung disease from which the person's forced expiratory volume for 1 second, when measured by spirometry, is less than 1 liter, or from which the person's arterial oxygen tension is less than 60 mm/hg of room air at rest. (e) A cardiovascular condition that causes the person to measure between 3 and 4 on the New York heart classification scale, or that renders the person incapable of meeting a minimum standard for cardiovascular health that is established by the American heart association and approved by the department of public health. (f) An arthritic, neurological, or orthopedic condition that severely limits the person's ability to walk. (g) The persistent reliance upon an oxygen source other than ordinary air.