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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
![This training vehicle fell from the hoist because the pads were not set correctly. No one was hurt, ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_45_06_294741512.png)
![The distribution of cones and rods over the human retina. The figure illustrates the number of cones ...](https://biology-forums.com/gallery/30/medium_548020_05_06_17_11_21_54_302921286.png)