Pinguecula, yellowish growths on the surface of the sclera, the white part of the eye, often occur in people who spent a lot of time in the sun. Although most pinguecula occur in middle aged or older people, children can also develop them, All About Vision states.
1 radian = 180 / pi degrees. This cannot be written in the format pi/x. cyberkiwi's answer would be in units of revolution, such that 1 rev is equivalent to a complete circle. Then 1/(2pi) revs would be equivalent to 1 radian.
Converting radians to degrees: To convert radians to degrees, we make use of the fact that p radians equals one half circle, or 180. This means that if we divide radians by p, the answer is the number of half circles. Multiplying this by 180 will tell us the answer in degrees. So, to convert radians to degrees, multiply by 180/p, like this: