Final answer:
Anne Sullivan is thought to have suffered from trachoma, which caused her to have extreme sensitivity to light, or photophobia.
Step-by-step explanation:
Anne Sullivan, the famous teacher of Helen Keller, suffered from a serious eye condition. Although the specific diagnosis is not widely agreed upon historically, the symptoms she experienced included extreme sensitivity to light, known as photophobia.
It is believed Sullivan had trachoma, a contagious infection of the eye, which caused her great discomfort and visual impairment when exposed to bright lights. After several operations, her vision improved, but she still dealt with residual sensitivity to light.