I just finished a small quilt for my mother who is 93 and has macular, also. Sewing has been her love for a lifetime, and she can't see to do a good job anymore. I still marvel at her artistic talent of putting colors together. I don't really know how she "sees" color, but she sees enough to do some amazing things. I chose a pattern that would be dense enough to catch the seams well enough so it will never fall apart! I found myself thinking of my mom and how much I love her and all the things she has done for me as I slowly quilted her latest quilt. She will never see the loose areas and mismatched seams. It looked so nice when I was finished.