What is a pinguecula? 

A pinguecula is a type of growth that can form on the conjunctiva of the eye. They are yellowish or very light brown and have a slightly raised, triangle shape. Pingueculae are not a type of cancer, but they can form when the eyes get too much exposure to UV rays. They usually appear close to the cornea, on the white part of the eye (sclera) between the iris and the nose.

Pinguecula causes

Ultraviolet radiation from the sun is the most common cause of pingueculae. Other common risk factors include frequent or long-term exposure to dust and wind. Dry eye disease may also be a contributing factor and can promote the growth of pingueculae.

Pingueculae are more common in middle-aged or older people who spend a lot of time in the sun. However, they can occur at any age for those who spend a lot of time outdoors without sun protection.