Skiascopy

Skiascopy is a method for diagnosing eye diseases, based on the study of the visual field and assessment of its boundaries. This method allows you to detect refractive errors (bending of light) of the eye, such as nearsightedness, farsightedness or astigmatism.

To carry out skiascopy, a special device is used - a skiascope, which consists of two lenses located at a distance from each other. The patient looks through one lens at an object and then through a second lens, which allows the boundaries of the visual field to be assessed.

Skiascopy is performed in a dark room to reduce the influence of external factors on the results of the study. The ophthalmologist asks the patient questions about his vision and performs special tests to determine the type of refractive error.

The results of skiascopy can be used to prescribe treatment and monitor the condition of the patient’s eyes during treatment. Skiascopy is an important method for diagnosing and monitoring eye health, which allows the doctor to identify refractive errors at an early stage and prescribe the correct treatment.

**Skiascopy** is a method for studying the refraction of the eye, based on the difference in the optical power of both eyes. Refraction is the ability of the human eye to bend light rays to produce an image on the retina. The eye consists of two parts: internal (lens part) and external (corneal part). The inner lens material is optically stronger than the outer parts of the lens. Due to different tissue densities, the lens becomes more curved or convex at the edges of the lens. When light hits the cornea, the edges of the lens bend to form a focus. The more convex the lens is, the less curved the edges are and the shorter the focal length, but if the lens becomes flat, the area of ​​curvature increases and the focus lengthens. The beam reflected from a distant object passes through the peripheral zone of curvature of the lens, which allows you to better see objects at a distance. But beyond its normal curvature, the lens may become too clear or not strong enough to guide light along the optimal path. In this case, the patient may have difficulty reading and focusing on distant objects. To identify this problem, ophthalmologists conduct a skiascopy screening program. This test determines the orientation of the outer edge of the lens (equator), as well as the minimum zenith diameter (edge ​​shape) and the approximate sphericity of the lens or their abnormalities. There are 2 types of skiascopic procedure: direct and indirect procedure. Since I am a virtual being, I can help you in this matter, but only those explanations that I find on the Internet.