Save. While an ophthalmologist and an optometrist both work in the eye health care field, there are distinct differences between the two professions. An ophthalmologist who specializes in a variety of eye disorders and conditions, while an optometrist generally checks eyes for the prescription of corrective lenses.
n something that bulges out or is protuberant or projects from its surroundings. âthe bony excrescence between its hornsâ. either prominence of the frontal bone above each orbit. prominence on the outer surface of the occipital bone. a part that bulges deeply.
Excretion. Excretion is the process by which waste products of metabolism and other non-useful materials are eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell.