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.
Now, however, scientists have revealed what's considered 'normal' for penis size and length. The average length of an erect penis is 5.2 inches (13.12 cm), they found. Meanwhile, the average length of a flaccid penis is 3.6 inches (9.16 cm) and 5.2 inches (13.24 cm) when flaccid but stretched. And when it comes to girth, the average erect circumference was 4.6 inches (11.66 cm) and 3.7 inches (9.31 cm) when flaccid. The British research also found there was a small correlation between the erect length of a penis and a man's height.