Is it compulsory to wear prescription glasses when driving in Northern Ireland if you need them to see clearly?

Yes. If you need glasses or contact lenses to meet the legal driving eyesight standard, you must wear them whenever driving.

The standard includes being able to read a number plate at the required distance in daylight. Do not assume that being able to see a dashboard or road signs at short distances is sufficient. Keep a suitable spare pair available if you rely on prescription glasses, and arrange an eye test if distance vision deteriorates.