Figure 1.

Example of a four-way hallway intersection as viewed normally (A) and with simulated visual impairment produced with blurring and contrast reduction (B). The geometric and non-geometric features depicted in A become less distinct in B with simulated visual impairment. In a virtual environment, geometric features can be displayed in high-contrast colors (C). Under reduced visual conditions, branching hallways are easier to detect in the virtual environment (D) compared to the real environment. Although these images do not necessarily simulate the subjective experience of people with low vision, they give some idea of the reduction of visual information associated with reduced spatial resolution or reduced contrast sensitivity.