Instrument for rapid measurement of the optical properties of the eye across the whole field of vision

Abstract

Instrument for measuring the optical properties of the eye across the whole field of vision, including refraction and aberrations, which comprises a frame (1) mounted on an ophthalmological table (2) that may be oriented in three perpendicular directions X, Y, Z and has a support surface (19) for the head, a hot mirror (3) and a long mirror (4), both rigidly secured to the frame (1) in front of the head. It also comprises a lighting subassembly (5) made up of a fibre optic head (6), a lens L1 (7), a diaphragm D (8) and a beam splitter BS (9), and a measuring subassembly (10) with two lenses L2 (11) and L3 (12), two mirrors M1 (13) and M2 (14) and a special camera (15) with a microlens array (16) at the input thereof, such that said camera (15) is positioned in the focal plane of the microlenses. The frame (1) has a motor (17) of which the shaft can rotate in the direction Y, to which is coupled an arm (18) that can rotate with said shaft, the components of the lighting subassembly (5), the components of the measuring subassembly (10) and the camera (15) with the microlens array (16) being mounted on said arm (18).

Description

technical field [0001] The present invention relates to an instrument for measuring the optical properties, refraction and aberrations of the eye over the entire field of view, in particular for the prescription of new correction systems, such as spectacles or contact lenses, which can Control myopia in children and adolescents. Background technique [0002] There is now more interest than ever in the capabilities of the human eye's peripheral vision (ie, what occurs outside the central area where details are clearly seen). This interest began in the 1970s, when it was suggested that peripheral vision would be an important factor in the development of myopia (see, for example, F. Rempt, J. Hoogerheide, and W.P.H. Hoogenboom's publication "Peripheral Retinoscopy and Radiography and Skiagram), Ophthalmologica 162, 1-10 (1971), or the publication of J. Hoogerheide, F. Rempt and W.P.H. Hoogenboom "Acquired Myopia in Young Pilots", Ophthalmologica 163, 209-215 (1971)). [0003...

AI Technical Summary

Problems solved by technology

This measurement takes a lot of time (several minutes), and to shorten the time, the number of angles is reduced, which results in poor angular resolution

In addition, there is also the question of whether rotating the eye changes the aberration due to the tension of the eye muscles on the optical part of the eye

The downside is that this measurement has very little density and is only able to measure a range of 30°, which is too small to form a good idea of ​​peripheral vision

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