thinning of the left optic nerve; ischemic neuritis; headache; head tightness; numbness of the right side of the body; temporary vision loss / blurred vision while the patient was watching tv, she could no longer distinguish colours and shapes.; turbidity right side loss salivation/salivation leak; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the regulatory authority-web. regulatory number: it-minisal02-844041. a 52 year-old female patient received bnt162b2 (comirnaty), intramuscular, administration date 13jun2021 (lot number: unknown) as dose 1, single for covid-19 immunisation. relevant medical history included: "monocular vision" (unspecified if ongoing), notes: monocular vision since birth for atrophy of the optic nerve on the right side; "allergopathy" (unspecified if ongoing). family history included: "familiar hypercholesterolemia." (unspecified if ongoing). the patient's concomitant medications were not reported. the following information was reported: headache (medically significant) with onset 14jun2021, outcome "unknown", described as "headache"; tension headache (medically significant) with onset 14jun2021, outcome "unknown", described as "head tightness"; hypoaesthesia (medically significant) with onset 14jun2021, outcome "unknown", described as "numbness of the right side of the body"; blindness transient (medically significant) with onset 14jun2021, outcome "unknown", described as "temporary vision loss / blurred vision while the patient was watching tv, she could no longer distinguish colours and shapes."; salivary hypersecretion (medically significant) with onset 14jun2021, outcome "unknown", described as "turbidity right side loss salivation/salivation leak"; optic nerve disorder (non-serious) with onset jul2021, outcome "unknown", described as "thinning of the left optic nerve"; neuritis (non-serious) with onset jul2021, outcome "unknown", described as "ischemic neuritis". the event "temporary vision loss / blurred vision while the patient was watching tv, she could no longer distinguish colours and shapes." was evaluated at the physician office visit. the patient underwent the following laboratory tests and procedures: investigation: diagnosed with thinning of the left optic nerve, notes: (the seeing eye) due to ischemic neuritis. additional information: after one hour salivation leak, numbness of the right side of the body, throbbing headache and pressure, symptoms passed within a few hours. after a week, blurred vision while the patient was watching tv, she could no longer distinguish colours and shapes. this symptom lasted for a few hours, the patient had been followed for years by the privacy. in july, she went to privacy and was diagnosed with thinning of the left optic nerve (the seeing eye) due to ischemic neuritis, familiar hypercholesterolemia and affected allergopathy. no follow-up attempts are possible; information about lot/batch number cannot be obtained. no further information is expected