The answer is the cataract. A cataract is a shadowing of the lens in the eye which leads to a decline of vision. Cataracts often progress slowly and can affect one or both eyes. Symptoms may include faded colors, blurry vision, and halos around light, trouble with bright lights, and trouble seeing at night.
What you could do is sit her down and talk to her and also tell a trusted adult.<span>Tell her you're concerned for her, and offer support by suggesting specific ways to help her stop using drugs. </span>