Children might inherit their parents' traits, such as the need for glasses for good vision. Some conditions such as cataracts, keratoconus, strabismus, lazy eye, retinitis pigmentosa, glaucoma, age-related macular degeneration, nearsightedness, and farsightedness can be inherited. Some of those conditions may require glasses. If keratoconus runs in your family, there is a 10% chance of acquiring it. However, not everyone is affected the same way. There are families where everyone wears glasses while in other families, nobody does. Still, there are families where some members wear glasses while others do not. A child may probably require glasses if both biological parents wear glasses.