Back to Health Risk Assessment â Body Composition Because water is contained primarily in fat-free tissues - the muscles - the percentage of total body water can vary widely between individuals. Those with a high percent body fat can be as low as 40% total body water, while very lean individuals and athletes can attain 70%. Water is the essential component of all vital fluids and the medium of transport in every biological exchange.
Definition of ophthalmology. : a branch of medical science dealing with the structure, functions, and diseases of the eye.
Ophthalmologists are a type of physician, and, thus, they are required to earn a medical degree. The process is a lengthy one, with a prospective ophthalmologist having to earn a 4-year bachelor's degree, complete four years of medical school and undergo 3-8 years of internships and residencies.