To give an indication of just how bad his eyesight still was when he was 20 years old, we should note that even at that time he could hardly read his own handwriting and could not bear to be in direct sunlight.
Upang bigyan ng indikasyon lamang ng kung paano ang masama pa rin ang kanyang paningin ay kapag siya ay 20 years old, tayo ay dapat tandaan na kahit na sa panahon na siya ay bahagya na basahin ang kanyang sariling sulat-kamay at hindi na madala sa direktang liwanag ng araw.