Trauma — Ophthalmological Emergencies and COVID-19 Pandemia
Citation(s)
Ehlken C, von Medem C, Lüdemann M, Kirsch AM, Roider JB Patients' perspective on emergency treatment of ophthalmologic diseases during the first phase of SARS-CoV2 pandemic in a tertiary referral center in Germany - the COVID-DETOUR questionnaire study.
Salvetat ML, Salati C, Busatto P, Zeppieri M The impact of COVID-19 related national lockdown on ophthalmic emergency in Italy: A multicenter study. Eur J Ophthalmol. 2021 Jul 3:11206721211028046. doi: 10.1177/11206721211028046. [Epub ahead of print]
Impact of COVID-19 Pandemic and Related Lockdown on Eye Emergencies Accesses
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
