First of all, I want to say the excessive ultraviolet rays in light would accelerate the occurrence and development of senile cataract and Senile chloasma. Wearing sunglasses is beneficial for both the young and the senior.
When choosing sunglasses for elders, I have some tips for you. Firstly, choose the lens that can prevent ultraviolet rays, secondly, choose some light color such as grey, tawny etc. because the dark color can make the environment looks darker when wearing them, and especially for the old people who are less attentive thirdly, if the users have vision problem, you had better choose the lens that have spectacles.