Refractive Errors — PRO Measure for Refractive Surgery IRAS Project Number 246072
Citation(s)
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Development of a New Patient Reported Outcome (PRO) Measure for Refractive Surgery Patients as Part of the National Dataset in Refractive Surgery
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
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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.
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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.
