Like most healthcare professions, the education and certification of optometrists is regulated in most countries. Optometric professionals and optometry-related organizations interact with governmental agencies, other healthcare professionals, and the community to deliver eye- and vision-care.
The average length of an erect penis is 5.16 inches (13.12 centimeters) and the average circumference is 4.59 inches (11.66 centimeters), according to a new analysis of penis length studies involving more than 15,000 men around the world.
At the start of puberty, the average length of the penis is 6 cm (2.4 in). The penis reaches adult size about five years later. A study done in 1996 found the mean length of an adult man's penis is 3.5 in (8.9 cm) when it is flaccid (pronounced [ËflaesÉªd] , ËFLÃ¦SÉªD-fla) (sid not erect or). hard