Farsightedness
Longsightedness, Hyperopia
When you can look at far things, but not near things, you have farsightedness.
えんし
The reading is the readings you learned with the kanji, which you'd know if it wasn't for your farsightedness (go get some glasses so you can read our lessons!).
遠視が進んできたので、そろそろ老眼鏡を買わなきゃいけないかもしれない。
My farsightedness is progressing, so I may have to get a pair of reading glasses soon.