Long-context reasoning has significantly empowered large language models to tackle complex tasks, yet it introduces severe efficiency bottlenecks due to the computational complexity. Existing efficient approaches often rely on complex additional training or external models for compression, which limits scalability and discards critical fine-grained information. In this paper, we first propose VTC-R1, a new efficient reasoning paradigm that integrates vision-text compression into iterative reasoning. Instead of processing lengthy textual traces, VTC-R1 renders intermediate reasoning segments into compact images, which are iteratively fed back into vision-language models as "optical memory". We construct a training dataset based on OpenR1-Math-220K achieving 3.4× token compression and fine-tune representative VLMs–Glyph and Qwen3-VL. Extensive experiments on benchmarks such as MATH500, AIME25, AMC23 and GPQA-D demonstrate that VTC-R1 consistently outperforms standard long-context reasoning. And VTC-R1 improves inference efficiency, achieving 2.7× speedup in end-to-end latency, highlighting its potential as a scalable solution for reasoning-intensive applications.