Besides being a truly unique work of genius with a totally unique world view, the large print edition also saved my sanity. I had gone in for my yearly ophthalmic exam - and had to have my pupils dilated - the first set of drops didn't work so they put in a second set - afterwards my pupils refused to constrict for hours! At home I couldn't focus at all to read - either a dtb or on my Kindle - even at the highest font size on a regular ebook, couldn't focus on the TV screen, etc. - I was going nuts! Then I remembered I had this large print version - loaded it and used the largest font size on my Kindle - and was able to read! Finally! I think I started off with maybe 5 - 10 words per screen, and gradually decreased the font size as my pupils finally recovered. It was an unforgettable experience.