The soulmate fic where everyone is covered in a scarf or bandana over their eyes till they meet their mate - I think it might be 'Our Hands Over Our Eyes ' by Idoltina on A03.
Thank you very much!
Canon UA: Everyone is born blind- literally. Falling in love with one’s soulmate means gaining sight.
Kurt Hummel learns to navigate life, love, and loss both with and without his sight, in black and white and color and every shade of gray.
Blaine Anderson reflects on the most tumultuous years of his sight journey when he finally loses it for good.