noun
A direct loanword from English, used in Japanese to refer to the ability to see. Often appears in medical, technical, or brand contexts (e.g., Subaru's driver-assist system).
アイサイトの検査を受ける。
I get an eyesight test.
スバルのアイサイトは安全運転を支援する。
Subaru's EyeSight supports safe driving.