Color is such an important tool to use for students with CVI in all Phases (Roman-Lantzy).
In Phase I, color can support initial visual location using the student’s preferred color. Identifying that preferred color in assessment can be the key to building more functional vision
In Phase II and III, carefully use of color highlighting can facilitate vision for function. Color highlighting in these Phases will help support understanding of where materials are in space, where to place materials and where to reach to grab effectively. It can be used to draw visual attention and to support discrimination using highlighting of salient features in communications systems and literacy. For Orientation and Mobility, color can support distance attention and understanding. Color highlighting must be well understood and well applied for the optimal benefit when building student visual learning.
Check out this Perkins E-Learning Teachable Moment I recently did to learn more!
http://www.perkinselearning.org/videos/teachable-moment/color-highlighting-children-cvi
cvi teacher 
This is so helpful. It can be easy to forget what you need to target.
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