Publication details
Srovnání základní keratometrie měřené dvěma odlišnými metodami
| Title in English | comparison of two measuring methods of keratometry |
|---|---|
| Authors | |
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | Česká oční optika |
| MU Faculty or unit | |
| Citation | |
| Field | ORL, ophthalmology, stomatology |
| Keywords | keratometry |
| Description | Measurement of the curvature of the front surface of the cornea in two main sections (meridians) perpendicular to each other is one of the basic corneal analyzes. Use in optometry practice of particular importance in the application of contact lenses most suitable for the determination of the basic curvature of the applied contact lens. In ophthalmology practice amenities such as when calculating the optical power of the implanted intraocular lens (IOL) for calculation of the ablation profile in laser refractive procedures, the selection of sukčního ring in the method of LASIK and more. For this measurement the curvature of the base there are many methods and principles. The basic and one of the most affordable we can include measurements using auto-refract-Keratometer, which include both optometry and ophthalmology in the integral part of the practice. From the physical point of view of processing the digitized image produced by reflection from the front surface of the cornea and the subsequent comparison with a reference element. The deflection of the reflected image are computed parameters required cornea. In our case it was the reference circle with a diameter of 3.3 mm and four auxiliary points lying on a circle with a diameter of 6 mm. In contrast, the methods in practice less affordable and physically working on a different principle includes systems with Scheimpflug camera. Using the Scheimpflug principle is photographed in a very sharp images of the anterior segment of the eye at high resolution. Once again this digital image processing. The advantage is to obtain a detailed description of the entire front, but also the back surface of the cornea. Cost thus advanced the technology is, however, for most optics and ophthalmology outpatient too high, so in general practice primarily with basic measurements using auto-keratometer. The aim of our study was to compare the keratometry measurements of these two physically different methods. |