I have a trouble seeing things up colse in these days. I self diagnosed as presbyopia refer to the website below.
https://www.vsp.com/farsightedness.html
Presbyopia is an age-related condition in which the lens of the eye becomes less flexible. Seeing details like words in a book or an online article, or adjusting focus between far-away and nearby objects is difficult. This condition is most common in people between the ages of 40 and 50.