![]() Keratometry in-vivo repeatability – +/- 0.1D.Central corneal thickness – 250-800µm.Number of measurement points – up to 100 000.Scheimpflug camera resolution – 2x1280x960.It is always the thickness of the measured length, as well as the precise measurement of both posterior and anterior corneal power that will be necessary for mapping out the next generation IOL planning. In the absence of the Galilei G4, all these measurements would require individual measuring, and this will not just introduce a variety of variations, but they may also be inaccurate, leading to wrong examinations and ultimately, the wrong type of lenses. The work of G4 optical biometry is to help determine the measurement of the central corneal thickness, the axial length, the lens thickness, and the anterior chamber depth, all during the same examination. ![]() Without the correct 1st Purkinje alignment, it would be troublesome to locate the visual axis and this may lead to inaccurate surface data as well as lack of consistency in the alignment. In most of the times, this reflex has always been aligned to the visual axis leading to very accurate surface data as well as a great deal of consistency when it comes series comparisons of executive measurements over a given period of time. The concept of 1st Purkinje reflex asserts that all data and maps should have the same reference point. This is not to mention the accuracy which it has also brought along the process. This is now easy because the system that the Galilei G4 uses has two Scheimpflug cameras, and these have helped to immensely reduce the amount of time needed to measure the anterior segment. It can be easily used for precise elevation of data as well as the precise pachymetry of both the posterior and anterior surfaces which will then be evaluated to give an indication if there is any bulging or to detect the onset of asymmetry. The process of detecting bulging of the cornea as well as problems with the asymmetry is now easy, thanks to the dual-scheimpflug tomography capabilities of the Galilei G4. With this instrument, examiners can precisely detect any kind of irregularity that may be present in the anterior surface as well as the quality of the tear film. However, Galilei G4 has the ability to produce Placido topography which in turn delivers accurate and detailed curvature cornea data. Getting this measurement wrong will mean that the entire procedure or treatment may be in jeopardy because the examiner will be working blind. With most of the corneal examinations, it is always important to get very accurate and precise data that relates to the anterior curvature of the cornea. Some of the key features of the Galilei G4 include :
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