The cloudiness of the eye is usually due to the following reasons: 1. It is caused by corneal edema, which is common in glaucoma, corneal endothelial dysfunction, endothelial keratitis, etc. The originally transparent cornea becomes like hairy glass due to edema, so it makes the eye lose its luster and look cloudy. 2. This is usually due to genetic abnormalities that lead to cholesterol crystals or collagen degeneration in the corneal stroma, which can cause the cornea to appear cloudy or even form white patches, which can also cause the eye to appear cloudy.