Eye drops that dilate the pupil: instructions for use. Drops "Tropicamide"
For the diagnosis of some ophthalmic problems, doctors need to see the fundus, which is impossible without artificial enlargement of the pupil. You can do this only if you use special medication. To achieve maximum mydriasis, drops that dilate the pupil allow. Drugs of this category are used in the process of examining children and adults. Let us consider in more detail which drops are used to diagnose various eye diseases.
When do I need drops to dilate the pupils?
The size of the pupil is constantly changing and depends on the lighting. Through this small hole with the help of a special tool - an ophthalmoscope - an ophthalmologist can look inside the eye and reveal pathology. However, some difficulties may arise during the examination. The light that radiates the device causes a narrowing of the pupil, which greatly complicates the diagnostic process. In order to avoid such difficulties, specialists use drops that dilate the pupil.
Drugs that can increase the diameter of the pupil, called mydriatic. The main task of such funds is to relax certain eye muscles. Indications for use are such pathologies as retinal detachment, dystrophic changes. Midriatics help in assessing the state of the vessels of the retina, the lens, and the optic nerve.
Assign drops can also for medicinal purposes. For example, with a spasm of accommodation, the medication will help eliminate tension in the eye muscle. Eye drops are used to dilate the pupil in the inflammatory processes of the eyes, in the process of surgical intervention.
If it is necessary to determine refraction in young children, it is important that the lens be immobilized. Achieve such an effect is also helped by mydriatica. Do not do without such drugs in the process of diagnosing astigmatism and farsightedness.
Effective and safe drops
Eye enlargement ophthalmic drugs are distinguished depending on the mechanism of action. Some drops - direct mydriatic - can cause a contraction of the muscle responsible for the pupil increase. Such drops include "Irifrin", "Phenylephrine".
The second group of drugs is called indirect mydriatic. They relax the muscle responsible for narrowing the diameter of the pupil. Similar effects these drops have on another muscle, which adjusts the focus. They can be used for medicinal purposes. Among such medicines eye drops are "Tropicamid", "Midrum", "Midratsil".
Drops of "Atropine"
Until recently, this drug was used in ophthalmic practice everywhere. However, to date, it is gradually replaced because of prolonged therapeutic effects, many contraindications and frequent cases of development of adverse reactions. The active component of eye drops - atropine sulfate - has a vegetable origin( alkaloid).The substance dilates the pupil and increases the intraocular pressure. Due to this, the paralysis of accommodation develops and the vision at a short distance deteriorates somewhat.
"Atropine" - droplets dilating the pupil, rarely used for severe diseases of the cardiovascular, urinary and digestive systems. Contraindicated drug in pregnancy, lactation and some pathologies of ophthalmological nature.
The maximum effect is observed after 30-40 minutes after instillation of drops and it persists for several days. If the effect of the drug does not stop for 7-10 days, it is classified as a side effect. The medicine can also provoke dizziness, tachycardia, flushing of the skin of the eyelids.
Tropicamid: instructions for use
Medication refers to mydriatica and affects the ciliary muscle of the eye, which is responsible for the change in the diameter of the pupil, as well as the receptors of the iris of the optic. As a result of the therapeutic action, a short-term enlargement of the pupil occurs, and its narrowing is prevented.
The drug is available only in the form of a solution for instillation into the eye. The active ingredient is tropicamide. In 1 ml drops can contain 5 or 10 mg of the active substance. Therapeutic effect after the application of drops appears after 5-10 minutes.
How many drops dilating the pupil, "Tropicamide"?The duration of the therapeutic effect depends on the concentration of the active ingredient. When applying 1% solution, the effect persists for 60 minutes. This concentration is usually used to diagnose ophthalmologic pathologies in children. Adult patients are prescribed "Tropicamide" drops in the form of a 2% solution. In this case, the effect of the drug lasts at least 2 hours.
Rules for the application of
According to the annotation, the drug can be used in the following cases:
- in the diagnosis of the lens;
- when examining the fundus;
- for refraction measurement;
- in the course of surgical intervention on the retina, lens;
- as part of complex therapy for the treatment of eye diseases;
- for the prevention of inflammation after surgery.
The concentration of the drug is selected depending on the required speed of the therapeutic effect and the purpose of application. The drug "Tropicamide" instruction for use is recommended to instill with the help of a dropper, which is equipped with a bottle, or use a pipette. The drug should get into the lower part of the conjunctival sac.
The maximum dilatation of the pupil can be achieved by instilling a 1% solution of 1 drop into each eye. If a drug with a lower concentration of active substance is used, it is necessary to drop first one drop and repeat the manipulation after 5 minutes.
"Tropicamide" for children
Drops that dilate the pupil can be used to diagnose vision, even in newborn babies. Only 0.5% solution is allowed. To prevent the occurrence of side effects, experts recommend diluting drops with physiological saline in a ratio of 1: 1 just before the actual use.
In rare cases, the drug can cause local side effects: photophobia, burning, reduced visual acuity, short-term increase in intraocular pressure.