Blurred afterglow in the eyes is a problem with peripheral vision, or visual field, and the visual field defects that occur are or a decrease in visual acuity. It may be caused by retinitis pigmentosa, glaucomatous optic nerve damage; it may also be caused by blurred afterglow after using certain medications that cause pupil narrowing or after wearing convex lenses; fundus diseases, such as optic papillar edema, arcuate spots around the optic disc in highly myopic eyes, and congenital abnormalities of the optic nerve papillae, can also cause blurred afterglow. Severe diseases, such as ischemic retinal optic neuropathy, retinal choroidal inflammation, retinal vascular obstruction, or retinal detachment, optic neuritis, and intracranial lesions can also lead to visual field defects.