There are lots of great suggestions online for adapting things in your home for your child with cortical visual impairment or CVI, to help the brain better be able to focus on an object or environment. Here are some of my favorite ideas, both involving a Sharpie:
1. Black out the background on busy pages in books to reduce the complexity of what your child is looking at and help your child “see” the main objects on these pages. I’ve had luck with some books but not with others that have super shiny/slick pages as the market doesn’t stick.
See how hard the purple bicycle or green pear are to see below, when against their like-colored backgrounds? That’s tough for a kid with CVI. The slick finish of these pages wasn’t the best for my Sharpie but would be easy to cover with black construction or contact paper, if you’re somewhat crafty (which, to be honest, I am not).

Here’s another example from another CVI mom:

2. Trace the objects on the pages so they have a black frame around them, which will help your child “see” them. (I also think many of these Jellycat books are great for CVI kids, given the simplicity of the pages).
3. Black out the background on wooden puzzles to help your child “see”the pieces to grab. You can use a Sharpie if the material allows or get fancy and use black shelf paper and an exacto knife, as shown in this blog post from Making Our Way In a Typical World.

Picture from Making Our Way in a Typical World
4. Color in the pages with the colors that interest your child. Black & White books are great, and are the first books that ever grabbed my kiddo’s attention. Take colored Sharpies and color in the white parts of these pages with the color that appeals most to your child.

Find more great ideas for your kid via the CVI Awareness Facebook group.