vision is very blurry and she feels like her optic nerve is twitching in both of her eyes.; vision is very blurry and she feels like her optic nerve is twitching in both of her eyes.; booster; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 23 year-old female patient received bnt162b2 (BNT162B2), administration date 11Dec2021 (Lot number: FD0809) at the age of 22 years as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (She says her first dose was LOT: EW0164 and she got it 20 Apr 2021., Dosage text: first dose injected in her arm), administration date: 20Apr2021, when the patient was 22 years old, for Covid-19 immunization; Bnt162b2 (She says her second dose was LOT: EW0179 and she got it on 14 May 2021.), administration date: 14May2021, when the patient was 22 years old, for Covid-19 immunization. The following information was reported: IMMUNISATION (non-serious) with onset 11Dec2021, outcome "unknown", described as "booster"; OPTIC NERVE DISORDER (non-serious) with onset 13Dec2021, outcome "unknown", VISION BLURRED (non-serious) with onset 13Dec2021, outcome "not recovered" and all described as "vision is very blurry and she feels like her optic nerve is twitching in both of her eyes.". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of optic nerve disorder, vision blurred.  Additional Information: Caller is a 23 year old female who received the booster dose of Pfizer BioNtech covid vaccine on Saturday, Today her vision is very blurry and she feels like her optic nerve is twitching in both of her eyes. she did not get any side effects from the first 2 doses and what she is experiencing now is very scary and she is not sure what is the cause of it or if this could be a side effect of the vaccine but she wants to know if this has been reported? E-transmitting potential duplicate AE. Additional Context: Consumer calling about the Pfizer COVID-19 booster shot who says she had a weird side effect that she is not sure was one and she tried to do research and did find a few articles, that it was rare. She says she got her booster vaccine dose Saturday, it is third day today and it started a little yesterday but today her vision is really blurred and she does have on her glasses and she can feel what feels like her optic nerve twitching. Caller clarifies this is for both eyes. Weight: Caller says she probably weighs too much, 210-215lbs. Primary Care Provider: Caller says she doesn't have one. Caller says part of her vaccine card is handwritten and the NDC/EXP were not provided for her doses. She says her first dose was LOT: EW0164 and she got it 20Apr2021. She says her second dose was LOT: EW0179 and she got it on 14May2021. She says she got her booster dose on 11Dec2021 and it was LOT: FD0809. Indication: Caller says she got it to protect her and her family, and everyone around her and to not get it or die from COVID. AE Treatment: Caller says she has her glasses on, and she also tried to splash her eyes with water and used eye drops and her vision is still very blurry. No further details provided about her eye drops. AE Outcome: Caller says that the blurriness got worse today, which is kind of scary.  No follow-up attempts are possible. No further information is expected.