Refractometry - Causes, Symptoms and Treatment .MF .

August 12, 2017 17:52 | Diagnosis In Ophthalmology

Refractometry - an objective method for studying refraction (refractive power) of the eye using a special apparatus - refractometers.Now ophthalmology widely used automatic (computer) refractometers.It is a modern method for studying the refraction of the eye, allowing you to quickly get an accurate result especially with minimal violations.This method is widely used in pediatric ophthalmology.With refractometry method can detect a variety of refractive errors such as nearsightedness, farsightedness or astigmatism and, accordingly, pick up the correction quickly and correctly.But the worse the vision of the patient, the less accurate the obtained data, so along with the diagnostic method used and other, allowing to determine the refraction of the patient's eye.

The objective methods of determining refraction and are also skiascopy and its variety - the bar skiaskopiya.Skiaskopiya is more time consuming method of research;and longer (about 10 minutes), but this method is more accurate.However, it should

be noted that during the skiascopy often not possible to accurately determine the direction of the principal meridians if astigmatism.
The principle of modern refractometer is the instrument infrared ray radiation, which when passing through the medium of the eyeball are recognized and registered by the device, where, with the help of a special program conducted data analysis.The result is displayed and is issued in printed form.

Indications refractometry:

1. Reduced visual acuity.
2. The pre-operative examination (ophthalmology).
3. Evaluation of the results of surgical or laser vision correction.

Contra refractometry:

1. Violation of transparency of optical media of the eye (cataract, cataract, vitreous opacities).
2. Serious mental disorders in a patient.
3. alcohol or drugs.

Preparation

Before the procedure to obtain the most accurate results, it is desirable to hold atropinization for 3 days, ie,prokapat atropine 2 times a day.Babies under one year prescribed 0.1% solution of atropine, for children from 1 to 3 years - 0.5% solution for children over 3 years of age and adults is assigned to a 1% solution of atropine.But on their own do not need - atropinization must appoint a physician.

procedure refractometry

Refractometry performed on modern computer devices - refractometer.The patient should sit in front of the machine, place the chin on a special support, in this case should be tightly pressed his forehead to the bar top.The doctor will adjust the position of the patient on their own heads.Next, the patient should not squinting, staring at the picture before his eyes, which smoothly changes its clarity.In modern devices ispolzuyutsyabolee complex images that can attract the patient's attention to the time of the survey, the most important in pediatric ophthalmology.In the blink is not prohibited by the study, but the head must be fixed.The study is conducted for each eye separately.

doctor suggests a target on the screen at the center of the pupil, and manually or automatically carried out a series of measurements.The result of the study physician receives a printout issued by the device on which data is recorded in the order of the sphere (sph), the cylinder (cyl), the axis (axis).

autorefractometry procedure lasts for 1-2 minutes.

Complications of the procedure itself has not.Complications are possible only with atropine - allergic reactions.It is necessary to immediately stop the use of atropine and seek immediate medical attention.

Ophthalmologist Odnoochko EA