Because patients needing medically necessary lenses often have irregular corneas, the process involved with fitting these lenses can be a difficult, expensive, time-consuming experience, that requires patience from and perseverence from both the practitioner and the patient.
Best Answer: An animal. Noun - name for an animal, person, place or thing. It refers to an inanimate object or a non-human one. Person refers only to humans. dog is a noun. a noun is a person, place, thing, or idea.
Definition of dog. 1a : canid wolves, foxes, and other dogs; especially : a highly variable domestic mammal (Canis familiaris) closely related to the gray wolf the family's pet dogb : a male dog dogs and bitches; also : a male usually carnivorous mammal.