2 (1) Use six albino rabbits for each test substance or stuffing material. Ensure that animal facilities for such procedures are designed and maintained so as to exclude sawdust, wood chips or other extraneous materials that might produce eye irritation. Examine both eyes of each rabbit before testing. Use only those rabbits without eye defects or irritation. Hold the rabbit firmly but gently until it is quiet. Place the test substance or stuffing material in one eye of each rabbit by gently pulling the lower lid away from the eyeball to form a cup into which the test substance or stuffing material is dropped. Gently hold the lids together for one second and then release the rabbit. The other eye, remaining untreated, serves as a control. For testing liquids, use 0.1 ml (2 drops) of the test substance or stuffing material. For testing solids or pastes, use 100 mg (1.5 grains) of the substance or stuffing material. For substances or stuffing materials in flake, granule, powder or other particulate form, use the amount that has a volume of 0.1 ml (2 drops) (after compacting as much as possible without crushing or altering the individual particles, such as by tapping the measuring container) whenever this volume weighs less than 100 mg (1.5 grains). In such a case, record the weight of the 0.1 ml (2 drops) test dose. Do not wash the eyes after instillation of the test substance or stuffing material except as noted in subsection (2).