Answer
Pressing beside the nose with the eye closed reduces drainage into the bloodstream, which may reduce systemic side effects while retaining the local effect.
Sources for this answer
- Taptiqom 15 micrograms/ml + 5 mg/ml eye drops, solution in single-dose container — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.