It found no signs or symptoms of thromboembolic incidents or visual disturbances.

它没有发现血栓事件或视力障碍的任何征兆或症状。

youdao

At concentrations in excess of 1.5%, carbon dioxide may produce hyperventilation, headaches, visual disturbances, tremor, loss of consciousness, and death.

在浓度超过1.5%时，二氧化碳可以造成换气过度、头痛、视力紊乱、颤抖、失去知觉和死亡。

youdao

The laser surgery for vision correction that replaced radial keratotomy (e. g., lasik and other procedures) is not associated with visual disturbances at high altitudes.

取代前项技术，用以矫正视力的雷射手术与高海拔的视觉障碍并无直接关系。

youdao

Tension headaches can sometimes be difficult to distinguish from migraines, but unlike some forms of migraine, tension headache usually isn't associated with visual disturbances (blind spots or flashing lights), nausea, vomiting, abdominal pain, weakness or numbness on one side of the body, or slurred speech.

CNN: Tension headache