1. The condition of having optimal visual acuity, typically measured as 20/20 vision (or 6/6 in metric systems), where a person can see details clearly at standard distances
After LASIK surgery, she achieved perfect sight without needing glasses.
Após a cirurgia LASIK, ela alcançou visão perfeita sem necessidade de óculos.
2. Figuratively, the ability to perceive or understand something with complete clarity
With perfect sight of the situation, he made the right decision.
Com visão perfeita da situação, ele tomou a decisão correta.