Ophthalmic advices:Pupil dilation

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Dilated pupil due examination

The pupil dilation is a special type of test in which the ophthalmologist puts drops in your eyes to dilate the pupil so we can check structures that normally they can not be observed with maximum detail such as lens (with the presence or absence of cataract), the retina, the vitreous and optic nerve. Dilation is mostly used for retinal screening.

The exam is performed within the eye through the pupil. Exploring with a broad general expansion allows easy viewing and assessing details of the more peripheral areas that are otherwise difficult to see. Meanwhile exploration without expansion allows viewing from a narrow space, so sometimes the ophthalmologist may ask you to move the eye in different directions and to see different parts of the eye and have a complete picture.

The cause of the dilation is a stimulation of iris that contracts, enlarging the size of the pupil. This situation occurs spontaneously in the dark and is reproduced with the drops.

The nuisance presenting with dilated eyes are related to blurred vision. This sensation can be annoying and affects the activities attempting closer view, such as writing or reading. Also the light is perceived more intense and can cause halos, glare and discomfort. The discomfort is most marked when the ophthalmologic examination is performed, as lamps are used in exploration. You can use sunglasses after dilation for comfort. We do not recommend driving or performing hazardous activities while the drops take effect, for this reason it is recommended that the patient always come together.

The effect dilation lasts approximately 6 hours, although the intensity decreases with time. In some patients, the duration can be increased by a special sensitivity.

There are some patients in whom pupillary dilation is not recommended, especially in cases with narrow angle, the risk of an attack of acute glaucoma. In these cases the ophthalmologist about the best procedure for scanning. In many cases it is preferred to delay the dilatation scanning laser or after performing an operation if required.