Refractometry

Refractometry is an ophthalmic diagnostic method used to measure the refractive power of the eye’s optical system. The examination is performed to diagnose myopia, hyperopia, and astigmatism, as well as to select appropriate vision correction methods.

When is refractometry indicated?

• Reduced visual acuity, blurred vision, headaches, or eye strain.
• Diagnosis of myopia, hyperopia, and astigmatism.
• Before prescribing eyeglasses, contact lenses, or performing laser vision correction.
• Routine monitoring of visual function in children, adolescents, and adults.
• Suspected age-related vision changes (presbyopia).

How is the examination performed?

1. The patient focuses on a fixation target inside an automated refractometer.
2. The device projects a light beam into the eye, which is reflected from the retina.
3. The instrument analyzes the reflected light and calculates the eye’s refractive status.
4. The results are displayed as numerical values and interpreted by an ophthalmologist.

Types of refractometry

• Automated refractometry. A fast and accurate method using a specialized device.
• Computerized refractometry. Provides detailed analysis of refraction and astigmatism.
• Retinoscopy (skiascopy). Commonly used in children and in patients with unstable accommodation.

Which conditions can be detected?

• Myopia — a refractive error in which the image is focused in front of the retina.
• Hyperopia — a condition where the image is focused behind the retina.
• Astigmatism — image distortion caused by an irregular curvature of the cornea.
• Presbyopia — age-related reduction of accommodative ability of the crystalline lens.

Advantages of refractometry in Belarus

• Speed and accuracy: the examination takes only a few minutes.
• Non-contact and painless procedure.
• High measurement precision, allowing accurate prescription of glasses and contact lenses.

In Belarus, refractometry is performed in modern ophthalmology clinics equipped with high-precision computerized diagnostic systems. The procedure enables accurate detection of refractive errors and selection of the optimal vision correction strategy.