I have vision issues myself. Here's a couple of tricks to help use that Olfa, first off you shouldn't be using the lines on the mat for your cutting, it will wear out the mat faster. If you can't ignore them, use the unmarked back and learn to use your rulers, there are tutorials on line or books/magazines that explain it better than I can -- a picture is worth a 1000 words! A 12.5" square will cut widths up to that with your fabric folded in fourths (will work on standard width fabric). If you need a longer length than that or are cutting borders from length of fabric, you might need two rulers.

For right handed people and a single ruler: Typically your cut edge will be on the left. Simply move your ruler to the desired width and cut, your left hand holding down the ruler securely. I fan out my fingers so have about 8 inches or so of contact. There are various methods and products to make your rulers less slippery. For me, I cut long cuts (width of fabric) while standing. Short cuts I can usually do sitting.

For right handed people and two rulers: Your cut edge will be on the right. Using the longer ruler measure the width you want, then square up your other ruler on the left side, hold securely with your left hand and move the right ruler out of the way, and cut. I often use two rulers even on narrower widths, just works well for me.

To see better all you need is a piece of paper, an old envelope or what ever. For an Olfa mat, white typing paper is great. Just slip a piece in under your cut edge and use that to see the difference between the fabric and the mat, it will also help make the lines on the ruler easier to see. It doesn't need to go in far, but if you cut some of it, no biggie. If you are using white fabric on a white mat, a colored piece of paper is perfect.

Hope that helps, I remember one particular quilt I cut before I figured out using the piece of paper, it was exactly Olfa green sashing and gave me all sorts of problems. Necessity was the mother of cheap invention that time and I've been using this trick to help me for a long time now.

This is also the one I bought. Love it.

I have used the for Olfa for years and much preferred it; until I purchased a Go Cutter. The deal came with a pale green cutting mat, which I find much easier to read, not the marks on the mat, but the lines on my rulers.

I'm really liking the Riley Blake (Lori Holt) cutting mats. They're two-sided, with different colors on each side. https://www.fatquartershop.com/lori-...g-mat-set-of-3 They cut without dulling my blade like the white ones. And they're self-healing like the good old Olfas.

I'm going to be the odd man out here, about 7 years ago I picked up the 24 x 36 that Walmart sells I thought for less than half of the price of an Olfa mat I would give it a try I really like it and I even encouraged my sister to get one as well!

I just got a quilt select to use with Deb tucker rulers. I have a Martelli mat but both sides have marking and I was having trouble lining up the Tucker rulers ...those lines kept getting in the way. Contacted Deb tucker to see what see used in her videos, mats with no marking...and got the 18 x 26 to use. The Martelli is a great mat but to match up any color with ruler lines, the plain white of the quilt select is better, imo.

I like the Quilter's Select mat and rulers.

I have one made by US Art Supply that is pink on one side and blue on the other. I don't know how well it will hold up long term as I don't use it a lot. But it cuts well and is self-healing. Larger ones are available. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1