This is my wonderful magnifying glass that neatly sits in the arm on my machine, a Bernina 730. It also fits on my 200 and 630. The 180 needed to have the arm retrofitted and installed.
There are 3 strengths, 5, 6, and 7. I am using the 6 now because I misplaced the 5 and the 7 is a bit too strong, but in a year or so I'll no doubt be glad I have it.
The lenses can be tilted to get the very best view. They are high quality so you don't get the motion sickness effect that I get with many others. I was terribly hesitant to buy these, but, reassured I could return them, I took them home, put them on my machine and was able to finish my miniature quilt, "A Visit to Provence," with ease. I can quilt faster because I can see so well.
One tip is to establish the quilting size before you put the magnifier on. Otherwise you will be making designs much smaller than you think.
Check with your machine's website or ask your dealer what would work for you. There are generics, stick-ons, free standing magnifiers. There are probably magnifiers you wear on some kind of head device. I like mine because it is so easy to pop it on or off, and it doesn't distort.
I don't use it for everything. I like to see an area for a big design so I know where to place it, how to build it. If it is a marked line, it can be done with a magnifier but be careful not to look at the needle. Look ahead of it but the magnifier will show you your stitches perfectly so you will know if the tension is correct, stitches even, etc.
I was doing some little clamshell samples in the photo above, about 1/4" in size, and the magnifier made them sooooooo easy. Without it they became irregular and not precise. Plus I got a headache trying to see them, and my neck muscles tightened up.
As I quilted the clamshells, every time I touched the center of the clamshell below I made a point to blink my eyes. Wow, I don't think I was blinking enough before; this made a very nice difference in how my eyes felt.
I don't buy many accessories for cutting, marking, sewing, quilting, but a few like the magnifier have become a necessity for me.
The sun came out today in Wisconsin after a week of deep dank gloom and fog over the mountains of snow. Things seem better now.
Keep quilting, your work gets better every day.