真っ赤だ
My eyes are bright red.
目が真っ赤です
My eyes are terribly bright red.
目がすごく真っ赤です
My eyes have been terribly bright red the whole time.
ずっと目がすごく真っ赤です
My eyes have been terribly bright red the whole time since this morning.
今朝からずっと目がすごく真っ赤です
After a sleepless night, my eyes have been terribly bright red the whole time since this morning.
徹夜したので、今朝からずっと目がすごく真っ赤です