Mydriatic optometry

Abstract: 12 ~ 40 patients with myopia, hyperopia or astigmatism should have mydriasis at the first optometry in principle. If the degree changes little at the second optometry, it can be added or subtracted after mydriasis optometry according to the original degree., Mydriatic optometry is a kind of optometry that is carried out when drugs are used to completely paralyze the ciliary muscle of the eye and make it lose its regulatory effect. This is mainly due to the strong adjustment of teenagers’ eyes. If the pupils are not dilated during optometry, the adjustment of ciliary muscle can make the lens convex and enhance the refractive power. It can not remove the so-called false myopia, which affects the accuracy of the results. Therefore, mydriatic optometry is very necessary for young people with myopia., Mydriatic optometry is mainly used in the following situations:, (1) children under the age of 12. Because of its strong regulatory effect, if the pupil does not dilate during optometry, the error will be very large. (2) for patients with myopia, hyperopia or astigmatism from 12 to 40, the pupil should dilate for the first optometry in principle. If the degree does not change much during the second optometry, the pupil optometry can be added or subtracted according to the original degree (3) Fundus and refractive stroma examination are normal, but visual acuity is poor. Mydriatic optometry is needed to rule out ametropia. (4) more complex ametropia, such as high myopia, high hyperopia or high astigmatism, and myopia or hyperopia combined with astigmatism (5) Teenagers with unstable eyesight, good eyesight and poor eyesight, are suspected to be pseudomyopia. Once this patient has mydriasis, the regulatory effect disappears, and the pseudomyopia will be eliminated. There are also some situations that are not suitable for mydriasis optometry:

Mydriatic optometry is a kind of optometry that is carried out when drugs are used to completely paralyze the ciliary muscle of the eye and make it lose its regulatory effect. This is mainly due to the strong adjustment of teenagers’ eyes. If the pupils are not dilated during optometry, the adjustment of ciliary muscle can make the lens convex and enhance the refractive power. It can not remove the so-called false myopia, which affects the accuracy of the results. Therefore, mydriatic optometry is very necessary for young people with myopia.

mydriatic optometry is mainly used in the following situations:

(1) children under the age of 12. Because of its strong regulatory effect, if the mydriatic optometry is not mydriatic, the error will be great.

(2) In principle, patients with myopia, hyperopia or astigmatism in the range of 12 ~ 40 should have mydriasis at the first optometry. If the diopter changes little at the second optometry, it can be added or subtracted after the small pupil optometry according to the original diopter.

(3) fundus and refractive stroma examination are normal, but their vision is poor. Mydriatic optometry should be used to exclude those with ametropia.

(4) more complex ametropia, such as high myopia, high hyperopia or high astigmatism, myopia or hyperopia combined with astigmatism.

(5) adolescents with unstable vision, good vision and poor vision are suspected to be pseudomyopia. Once the pupil dilates, the adjustment effect disappears, and the pseudomyopia disappears.

There are also some situations that are not suitable for mydriatic optometry:

(1) mydriatic optometry is contraindicated for glaucoma patients, otherwise it will induce acute attack of glaucoma.

(2) patients suspected of glaucoma should also be very careful if they find shallow anterior chamber, high intraocular pressure or in the high limit of normal value.

(3) Patients over the age of 40 generally do not need mydriatic optometry due to the weakening of accommodation.

precautions after mydriasis:

(1) pupillary dilation due to ciliary muscle paralysis after pupil dilation, so the pupil will not shrink even if it does not encounter strong light. Therefore, the phenomenon of photophobia will occur, such as the direct exposure of the retina to the fundus oculi, resulting in ocular fundus injury. After the ciliary paralysis, the disappearance of the regulation will make the reading and writing work obscure. The action time of mydriatic drugs is 4-6 hours and that of atropine is about 20 days Therefore, we should be prepared before and after mydriasis, and arrange the study and work plan in advance, which will bring inconvenience to children’s study.

(2) children will be afraid of light after mydriasis. Therefore, during mydriasis, strong light stimulation, especially sunlight stimulation, should be avoided. Outdoor activities should be reduced and sunshades or sunglasses should be worn.

(3) during mydriasis, due to blurred vision, children can’t see close clearly. Pay attention to children to avoid bruises.

(4) During mydriasis, try to reduce close eye use, such as stopping reading, doing homework, watching TV and using computer as little as possible.

(5) drink more water for children during medication. Hyperemia of eyes, swelling of eyelids and rash are allergic reactions, fever, red face, dry mouth, breathing and accelerated heart rate are atropine poisoning reactions, which should be treated by doctors in time.