In theory, corneal abrasions and allergic reactions could, if left untreated, affect vision. In my experience, this is a rare occurrence. For the vast majority of people under the care of ophthalmologists, contact lenses are a safe and convenient alternative to traditional glasses. Perhaps your mother would feel more comfortable chatting about this with an eye specialist. I'm 11 years old and have warts on my thumbs.
Warts are the result of a particular virus infection of the skin.
They often disappear on their own without treatment. Commercially available wart-removing compounds, such as Vergo, may be useful if the warts persist or return. In such instances, you might ask your parents to take you to a dermatologist who could remove the warts or give you further information about getting rid of them.