英语语法分析

Diagnosis is made by direct and indirect ophthalmoscopy.

通过直接和间接检眼镜观察即可作出诊断。

For more complicated procedures, scanning laser ophthalmoscopy is available.

更加复杂的工具还有扫描激光检眼镜。

Ophthalmoscopy affords the only opportunity for direct visualization of blood vessels.

检眼镜检查法提供直接观察血管的唯一机会。