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Vision diagnosis

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Vision diagnosis – is an important step in the prevention of eye diseases and maintaining good vision for many years! Timely detection of eye pathology is the key to successful treatment of many eye diseases. As practice shows, eye diseases occur at any age, so everyone should undergo eye examination at least once a year! Timely detection of eye pathology is the key to successful treatment of many eye diseases. As practice shows, eye diseases occur at any age, so everyone should undergo eye examination at least once a year.

Why is complete vision diagnosis so important?

Vision diagnosis is necessary not only to identify primary eye pathology, but also to address the possibility and feasibility of a surgery, to choose a treatment method, as well as to accurately diagnose the condition of the visual organ in a dynamic aspect. In our clinic, a complete ophthalmologic examination is carried out using the most advanced diagnostic equipment.

What examinations are included in the complete diagnostic workup of the vision system and what are they like?

Any eye examination begins with a conversation to identify the patient's complaints and to record the past medical history. This is followed by diagnosis of the visual organ using special equipment. Such diagnostic examination includes the analysis of visual acuity, study of refraction, intraocular pressure measurement, eye examination under a microscope (biomicroscopy), pachymetry (measurement of the corneal thickness), echobiometry (eye length measurement), ultrasonic examination of the eye (B-scan), computer corneal topography and thorough examination of the retina (fundus) with a wide pupil, lacrimation measurement, evaluation of the patient’s visual field. When detecting an eye disease, the examination scope is extended to include specific clinical manifestations in a particular patient. Our clinic is equipped with modern, professional ophthalmic equipment produced by such companies as ALCON, Bausch & Lomb, NIDEK, Zeiss, Rodenstock and Oculus, allowing examinations of any level of complexity.

Special charts with pictures, letters or other characters are used in our clinic for measurement of visual acuity and refraction. Using an automatic phoropter NIDEK RT-2100 (Japan), the doctor interchanges dioptric glasses and selects the most appropriate lens to ensure the best possible vision for the patient. In our clinic we use halogen chart panels NIDEK SCP - 670 with 26 test charts and analyze the test results obtained for a narrow and wide pupil. Computer testing of refraction is carried out with an auto refkeratometer NIDEK ARK-710A (Japan), which allows precise measurement of the eye refraction and biometric parameters of the cornea.

Intraocular pressure is measured using a non-contact tonometer NIDEK NT-2000. If necessary, intraocular pressure measurement is carried out by contact method, with Maklakov or Goldman tonometers.

To study the state of the anterior segment of the eye (eyelids, eyelashes, conjunctiva, cornea, iris, lens, etc.), a slit lamp NIDEK SL-1800 (biomicroscope) is used. It helps the doctor to assess the state of the cornea, as well as the deeper structures such as the lens and vitreous.

During a complete eye examination all patients undergo fundus examination, including areas at its periphery, with a wide pupil. It reveals degenerative changes of the retina, allows diagnosing breaks and subclinical detachment – a pathology which cannot be clinically determined by the patient but requires mandatory treatment. To expand pupils (mydriasis) short-acting drugs are used (Midrum, Mydriacyl, Cyclomed). If any changes in the retina are noticed, we prescribe preventive laser coagulation using a special laser. In our clinic, only the best and modern models are used: YAG-laser, diode laser NIDEK DC-3000.

One of the important methods for vision diagnosis before any refractive surgery for the correction of vision is computer corneal topography, aimed at studying the surface of the cornea and its pachymetry, i.e. thickness measurement.
RCG_3861 (21).jpgOne of the anatomical manifestations of refractive errors (nearsightedness,farsightedness) is a change in the eye length. This is one of the most important indicators, which in our clinic is determined by non-contact method with the help of IOL MASTER produced by «ZEISS» (Germany). This is a combined biometric device, which also provides data for the calculation of IOL for cataract. With the help of this device the length of the eye axis, the radius of the cornea and the depth of the anterior eye are measured in a single session. All measurements are carried out by non-contact method, which is extremely comfortable for the patient. Based on the measured values, a built-in computer offers optimal intraocular lenses. This is made on the basis of the existing international formulas.

Ultrasonography is an important addition to generally accepted clinical methods for ophthalmic diagnosis; it is a widely known and informative instrumental method. This study makes it possible to obtain information about the topography and structure of normal and pathological changes in tissues of the eye and the eye socket. With the A-method (one-dimensional imaging system) the corneal thickness is measured, as well as the depth of the anterior eye, thickness of the lens and eye coats, and the eye length. The B-method (two-dimensional imaging system) allows evaluating the state of the vitreous body, diagnosing and assessing the height and extent of detachment of the choroid and retina, detecting and measuring the dimensions and location of retrobulbar and ocular tumors, as well as detecting and identifying the location of a foreign body.

Another necessary diagnostic method is the study of the visual fields. The visual field (perimetry) is determined for:

  • diagnosis of ocular diseases, particularly glaucoma;
  • dynamic monitoring for the prevention of eye diseases.

Special equipment also measures the contrast and threshold sensitivity of the retina. This makes possible early diagnosis and treatment of a number of eye diseases.

Other parametric and functional data of the patient are studied too, for example, the level of lacrimation. The most diagnostically sensitive functional studies are used, such as Schirmer test and Norn test.

RCG_38751.jpgAnother modern method of studying the inner coat of the eye is optical scanning tomography of the retina. This unique technique allows getting an idea of the retinal structure throughout its depth, and even measuring the thickness of its layers. It helps to identify the earliest and smallest changes in the structure of the retina and optic nerve that are not available to the human eye. The operation of the optical tomographic scanner is based on the phenomenon of light interference, which means that the patient is not exposed to any harmful radiation. The test takes several minutes, does not cause eye fatigue and does not require direct contact between the eye and the sensor. Similar devices for vision diagnosis are available only in large hospitals in Russia, Europe and the United States.

The study provides valuable diagnostic information about the structure of the retina in case of macular degeneration and diabetic macular edema. It allows making an accurate diagnosis in difficult cases, as well as offers a unique opportunity to monitor the dynamics of treatment, based not on the subjective opinion of the doctor, but on well-defined values ​​of retinal thickness. In glaucoma, the study gives detailed information on the status of the optic nerve and the thickness of the nerve fiber around it. Highly accurate measurement of the latter characteristic ensures the identification of the earliest signs of this terrible disease, even before the patient can observe the first symptoms.

Given the ease of the procedure and the lack of discomfort, we recommend making the measurements every 2-3 months (in case of glaucoma), or every 5-6 months (in case of diseases of the central retina). Re-examination helps to determine the activity of the disease, to clarify the correctness of the chosen treatment, as well as to make a correct forecast about the prognosis of the disease. This is particularly important for patients with macular holes, as the probability of development of such a process on a healthy eye can be predicted after tomography. The early, “pre-clinical” diagnosis of fundus changes in diabetes is possible too.

What happens on completion of examination?

On completion of examination using special equipment (vision diagnosis) the doctor carefully analyzes and interprets all information received about the condition of the visual organ. On the basis of the data the doctor makes a diagnosis and draws up a treatment plan. The data and the treatment plan are explained in detail to the patient.

What is the cost of diagnostic examination?

The cost of diagnostic examination (vision diagnosis) depends on its scope. For the convenience of our patients, we have made complexes for the most common eye diseases such as cataract, glaucoma, myopia, hyperopia or the pathology of the fundus.

The price of a complex diagnostic examination in our clinic starts from 2,200 rubles.

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