Nigel states that he does not like social studies class because they spend most of the time reading. He claims that the text is blurry when he holds the book close to his face. He often complains of headaches. His teacher says that he is seeking attention because there are days that his vision is fine. Nigel is exhibiting symptoms of .

astigmatism                                                                        

Explanation:

Astigmatism is described as one of the common conditions associated with an eye that leads to developing blurred vision in a person. Astigmatism generally occurs when an individual's cornea i.e, the eye's front cover is being irregularly shaped or at times due to the lens curvature present inside his or her eye. Astigmatism can cause distorted, blurry, or fuzzy vision.

As per the question, Nigel is exhibiting symptoms of astigmatism.

answer; the correct answer is (travel horizontally);