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12 September 2026 · 2 min read · Kanmani Eye Hospital

What to expect at a dilated eye examination

Why we use drops, how long the blur lasts and what to bring.

A dilated eye examination lets the doctor see the retina and optic nerve at the back of the eye, which cannot be seen properly through a small pupil. It is the most thorough routine eye check we do.

First, an optometrist measures your vision and glasses power and checks your eye pressure. Then we put drops in each eye to widen the pupils. The drops take 20 to 40 minutes to work, so bring something to listen to and expect a wait.

Once your pupils are wide, the ophthalmologist examines your eyes with a slit lamp and a bright handheld lens. You will be asked to look in different directions. It is not painful, though the light can feel strong.

Afterwards your near vision will be blurred and bright light will feel uncomfortable for four to six hours. Do not drive or ride a two-wheeler home. Bring sunglasses, and someone to accompany you if possible.

Before you leave, the doctor explains what was found and gives you a printed summary. If you need glasses, the prescription is ready the same day, and our optical shop downstairs can make them in about two working days.

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