Lot more a-fib symptoms; Feeling wierd; Big black spots in eyes / vision problems; Flashing in eyes; Muscle pain; This spontaneous case was reported by a consumer and describes the occurrence of ATRIAL FIBRILLATION (Lot more a-fib symptoms), FEELING ABNORMAL (Feeling wierd), VISUAL IMPAIRMENT (Big black spots in eyes / vision problems), PHOTOPSIA (Flashing in eyes) and MYALGIA (Muscle pain) in an 82-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 023E21A and 088D21A) for COVID-19 vaccination.     The patient's past medical history included Cataract operation. Concurrent medical conditions included Atrial fibrillation. Concomitant products included METOPROLOL SUCCINATE for Atrial fibrillation.   On 31-Jul-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 28-Aug-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In 2021, the patient experienced FEELING ABNORMAL (Feeling wierd), VISUAL IMPAIRMENT (Big black spots in eyes / vision problems), PHOTOPSIA (Flashing in eyes) and MYALGIA (Muscle pain). In September 2021, the patient experienced ATRIAL FIBRILLATION (Lot more a-fib symptoms). At the time of the report, ATRIAL FIBRILLATION (Lot more a-fib symptoms), FEELING ABNORMAL (Feeling wierd), VISUAL IMPAIRMENT (Big black spots in eyes / vision problems), PHOTOPSIA (Flashing in eyes) and MYALGIA (Muscle pain) had resolved.            No Treatment medication was reported. Consumer stated 1 week after getting the vaccine consumer got a cataract surgery. Consumer stated some eye drops were given. Consumer stated she started feeling weird and started having muscle problems. Following month on 12 Sep 2021 she got a cataract surgery in another eye. The surgeries were not a result of covid-19 vaccination. Consumer stated following the second dose of the vaccine, she started having a lot more a-fib symptoms and strong symptoms. They started in late part of September through October. Consumer also stated she started having vision problems, saw big black spots and flashing in eyes. Consumer said she was nervous when she was going for cataracts surgery and that might be the cause a-fib symptoms but that is not the case according to consumer. Consumer stated she reached out to her cardiologist, who said everything was normal. No tests or exams performed. Consumer was scheduled for some kind of sound procedure soon. Consumer does not have past medical history of covid-19 and myocarditis or pericarditis.  Company Comment: This case concerns a 82-year-old female patient with a relevant medical history of Atrial fibrillation and recent elective Cataract surgery, who experienced the unexpected non serious event of Atrial fibrillation aggravated and Visual impairment after mRNA- 1273 Moderna vaccine. The onset of the events occurred approximately within the month after the second dose of mRNA- 1273 vaccine. Cardiologic assessment was unremarkable. At the time of the report, the events had resolved. The rechallenge is not applicable, since the events were reported exclusively after the second dose. Previous history of Atrial fibrillation and recent cataract surgery remains a confounder. The benefit-risk relationship of mRNA- 1273 vaccine is not affected by this report; Sender's Comments: This case concerns a 82-year-old female patient with a relevant medical history of Atrial fibrillation and recent elective Cataract surgery, who experienced the unexpected non serious event of Atrial fibrillation aggravated and Visual impairment after mRNA- 1273 Moderna vaccine. The onset of the events occurred approximately within the month after the second dose of mRNA- 1273 vaccine. Cardiologic assessment was unremarkable. At the time of the report, the events had resolved. The rechallenge is not applicable, since the events were reported exclusively after the second dose. Previous history of Atrial fibrillation and recent cataract surgery remains a confounder. The benefit-risk relationship of mRNA- 1273 vaccine is not affected by this report