Nuclear cataracts are also known as sclerotic cataracts, a type of cataracts that is the most common to doctors. This type of cataract does form in the center of the eye lens, known as the nucleus. If not treated for longer, this might grow up harder and turn yellowish and even brown. Also, with this type of cataract, it might get hard to see objects at night. Nuclear cataracts are also known as sclerotic cataracts, a type of cataracts that is the most common to doctors. This type of cataract does form in the center of the eye lens, known as the nucleus. If not treated for longer, this might grow up harder and turn yellowish and even brown. Also, with this type of cataract, it might get hard to see objects at night. Nuclear cataracts are also known as sclerotic cataracts, a type of cataracts that is the most common to doctors. This type of cataract does form in the center of the eye lens, known as the nucleus. If not treated for longer, this might grow up harder and turn yellowish and even brown. Also, with this type of cataract, it might get hard to see objects at night.