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Why is atropine not used to dilate the pupil for routine examinations in adults?

It is too expensive

Its effects last too long

Atropine is not commonly used to dilate the pupil for routine examinations in adults primarily because its effects last too long. When administered, atropine can cause prolonged dilation of the pupil (mydriasis) that can last from several days to even a week. This extended duration can be impractical and uncomfortable for patients who may need to engage in daily activities that require normal vision, such as driving or reading.

In routine eye examinations, shorter-acting mydriatic agents are preferred to allow for adequate pupil dilation during the exam while minimizing the disruption to the patient’s daily life afterward. The lasting effects of atropine make it less suitable for contexts where quick recovery of normal vision is desired.

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It causes severe pain

It has no effect on dilation

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