Pupil dilation is the application of drugs to make the eyes of the ciliary muscle completely paralyzed, so that the loss of regulation of the case of optometry. This is mainly because young people's eyes are more adjustable, if the pupil is not dilated, the regulation of the ciliary muscle can make the lens convex, refractive power increased, can not be adjusted myopia that is the so-called pseudo-myopia component removed, and affect the accuracy of the results.

I, need to pay attention to the dilated pupil

1, diagnostic dilation: for one eye, double vision, the elderly and children, dilated pupil will appear after the vision is not clear, to the action of the difficulty, it is recommended that someone to accompany. （

2. As the purpose of dilation is to relax the regulation of the ciliary muscle, do not use your eyes in close proximity during the period of dilation, such as reading books, watching TV and using the computer.

3, because atropine can make the pupil dilation, patients feel photophobia, near vision difficulties are normal phenomenon, but if more strict or feel uncomfortable, we recommend that you consult a doctor in time.

4, therapeutic pupil dilation after stopping the drug, about three weeks to return to normal pupil, but due to individual differences, the pupil recovery time will be different, are normal.

5, a very small number of patients with dilated pupils, such as the emergence of obvious facial flushing, thirst, fever, headache, nausea, vomiting, constipation, phantom vision, spasms, euphoria, eyelid edema and other symptoms are considered to be an adverse reaction to atropine, the drug should be stopped immediately or consult an ophthalmologist.

6, some patients with ocular distension manifestation, immediately seek medical attention.

The purpose of dilating the pupils is to relieve eye fatigue and relax the muscles, so that the refractive error is more accurate. The pupil dilation itself will not cause adverse effects on the patient. However, after dilating the pupils, there may be temporary fear of light and blurring of near objects (there is no effect on distance viewing, and you can still live a normal life), the time to return to normal varies depending on the different pupil-dilating medicines, tolcamide is generally 4-6 hours to return to normal, after the matropium needs 3 days, atropine pupil dilation lasted about 2-3 weeks can be recovered on their own, there is no harmful effect on the eyes. After the pupil dilation can make the eye in a state of rest, can also be used to prevent myopia accordingly. However, attention should be paid to blocking in bright light to reduce the intake of ultraviolet rays.