Oregon Revised Statutes Wildlife § 496.018

(a) Is permanently unable to walk without the use of, or assistance from, a brace, cane, crutch, prosthetic device, wheelchair, scooter or walker;

(b) Is restricted by lung disease to the extent that the person's forced expiratory volume for one second, when measured by a spirometer, is less than 35 percent predicted, or arterial oxygen tension is less than 55 mm/Hg on room air at rest;

(c) Has a cardiac condition to the extent that the person's functional limitations are classified in severity as Class III or Class IV, according to standards established by the American Heart Association;

(d) Has a permanent, physical impairment that prevents the person from holding or shooting a firearm or bow or from holding a fishing rod in hand; or

(e) Has central visual acuity that permanently does not exceed 20/200 in the better eye with corrective lenses, or the widest diameter of the visual field is no greater than 20 degrees; or