A 12-year-old patient is seen at your office complaining of distance blur. Cover test reveals 4 prism diopters of exophoria at near. Subjective refraction reveals -2.25 DS OU. The patient returns 4 weeks later and reports that her vision is clear at a distance with the glasses, but when she reads, her eyes become fatigued, and she reports frontal headaches, all of which she did not experience prior to getting her glasses. What is the MOST likely etiology of her headaches while reading?
A. Her glasses are too tight and are putting pressure on her temples
B. The pantoscopic tilt is incorrect and is inducing unwanted astigmatism
C. The optical center of her glasses was measured too low
D. Resultant esophoria at near induced by her glasses