Zennis diasppointing

Feb 21, 2012 41 Replies
Saved reading

Not necessarily. My bifocals are set so the top is in focus at about 24" (monitors) and the bottoms about 12" (books/desk). I know people who have had these reversed for special purposes. "Bifocal" simply means there are two focal lengths in a single lens.

Both measure intraocular pressure. The air puff is sort of a down and dirty, not as accurate one.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required