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Optometry: Search Tips

PICO Framework for Opto Research Questions

Use PICO to frame research questions. Determine the population or problem, the intervention, a comparison intervention, and outcomes. Use the keywords for those ideas in your searches.

Population / problem examples: astigmatism, myopia, cataracts, eye tracking, children, adults, aged

Intervention examples: corrective lens, surgery

Comparison interventions are optional

Outcome examples: improved vision

Search Operators and Tips

Boolean Operators



Use "OR" when combining terms within the same PICO frame.

Use "AND" when combining terms from different PICO frames.

The "NOT" operator is a very blunt instrument; avoid it most of the time.