blurry vision five minutes after the shot; seizures on the same day; This spontaneous case was reported by a consumer and describes the occurrence of VISION BLURRED (blurry vision five minutes after the shot) and SEIZURE (seizures on the same day) in a 30-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 027C21A) for COVID-19 vaccination.     The patient's past medical history included COVID-19 (had covid-19 twice before receiving the vaccine once in APR-2021) in April 2021. Concurrent medical conditions included Epilepsy. Concomitant products included LEVETIRACETAM (KEPPRA [LEVETIRACETAM]), LAMOTRIGINE, LOPERAMIDE HYDROCHLORIDE (LOMOTIL [LOPERAMIDE HYDROCHLORIDE]), ATORVASTATIN, LORAZEPAM (ATIVAN), ONDANSETRON (ZOFRAN [ONDANSETRON]) and CLONAZEPAM (KLONOPIN) for an unknown indication.    On 12-May-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 12-May-2021, the patient experienced VISION BLURRED (blurry vision five minutes after the shot) (seriousness criterion hospitalization). 12-May-2021, the patient experienced SEIZURE (seizures on the same day) (seriousness criteria hospitalization and medically significant). The patient was hospitalized from 12-May-2021 to 19-May-2021 due to SEIZURE and VISION BLURRED. At the time of the report, VISION BLURRED (blurry vision five minutes after the shot) outcome was unknown and SEIZURE (seizures on the same day) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In April 2021, Computerised tomogram: unknown (Inconclusive) unknown. In April 2021, Lumbar puncture: unknown (Inconclusive) spinal tab from CNS fluid to make sure there was no cox in his brain. In April 2021, Magnetic resonance imaging: unknown (Inconclusive) unknown.     mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was withdrawn on an unknown date.       The patient had epilepsy as pre-existing condition and he was on unspecified medication for that. The patient has seizures on the same day of vaccination and was transferred to hospital. Patient had magnetic resonance scan (MRI) and patient had seizures over there for which he was moved to sister hospital where they did scan under anesthesia. Before discharging patient from hospital they took spinal tab from central nervous system (CNS) fluid to make sure there was no Cyclooxygenase (COX) in his brain.  Patient's physician told to not receive the second dose of Moderna vaccine.   No treatment information was reported.  Company comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded   This case was linked to US-MODERNATX, INC.-MOD-2021-154269 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 25-May-2021: Additional information was received and events, hospitalization details and laboratory data updated.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded US-MODERNATX, INC.-MOD-2021-154269:Crosslinked case of reporter friend case