这种隐形眼镜在光学上设计得非常舒适，适合长时间佩戴。

These contact lenses are ___optically designed for comfort during long hours of wear.

这副眼镜采用光学镜片，能减少眼睛疲劳。

These glasses use ___optically treated lenses to reduce eye strain.

这两种液体看起来一样，但实际上成分完全不同。

The two liquids are ___optically identical but have completely different compositions.