Which of the following disease is close related with nutrient A: Diabetes B: Red green color blindness C: Night blindness D: Stroke E: Sickle cell anemia

The passage mainly about（） A: color and its surprising effect B: the eyes of likely things C: danger caused by color blindness D: color blindness and color preference

Among people who suffer from colour blindness,________ .

This is an illness that can result in total blindness ________ left untreated.

中国大学MOOC: ___________is the most common cause of vision loss in people over age 40 and is the principal cause of blindness.

“On his Blindness” and “On his Deceased Wife” are the two best-known of Milton's ( ).

But history shows the fallacy of this belief. A: blindness B: ridiculousness C: correctness D: falseness

中国大学MOOC: In his blindness, Milton wrote his most important poetic works, such as________.

WHO prescribed visual acuity lower than ­­_____ for blindness ( ) A: 0.1 B: 0.02 C: 0.05 D: 0.08

Night blindness is mainly caused by lack of( ).() A: Vitamin A B: Vitamin B1 C: Vitamin D D: Vitamin E