Axis oculi length measuring device and axis oculi length measuring method

Abstract

The invention discloses an axis oculi length measuring device and an axis oculi length measuring method. The axis oculi length measuring device comprises a light source, a spectroscopical module, a reference arm module, a sample arm module and a detection module. According to the axis oculi length measuring device disclosed by the invention, measurement of axis oculi length is realized through thenature of OCT, and the disadvantage that an optical related biomeasuring instrument easily measures a patient suffering from vitreous opacity wrongly is overcome; one beam of detection light is separated into two beams of detection light through a sample arm, the two beams of the detection light are respectively focused on a cornea and a retina for simultaneous scanning, and images are simultaneously obtained; the optical axes of the two beams of the detection light are coaxial, so that the measuring result is free from the influence of eye movement; for the patient suffering from vitreous opacity, the light penetrating power of eyes is weakened, but final measuring accuracy cannot be influenced; and besides, the measuring method provided by the invention combines equipment for measuringaxis oculi length with OCT equipment, so that the situation that which layer of the retina the specific measuring position on the retina is located on can be more intuitively seen.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an eye axis length measurement device and an eye axis length measurement method. Background technique [0002] The axial length of a normal adult is about 24 mm. According to the calculation of refraction, the diopter is about 3D for every 1 mm difference in the axial length. At present, there are mainly two methods for measuring the eye axis: optical coherence biometer (abbreviated as IOL-Master, non-contact measurement) and ultrasonic measurement (ie A-ultrasound, contact measurement). The optical coherence biometer adopts partial coherence or low coherence interference technology. The light source adopts a light source with a certain bandwidth and good spatial coherence. The interference is realized by making the optical phase of the reference arm and the sample arm smaller than the coherence length of the light source. However, due to the high cost of IOL-Master equi...

AI Technical Summary

Problems solved by technology

OCT technology obtains the transverse tomogram of the position by continuous transverse scanning of the anterior segment and the posterior segment of the eye. Even for patients with vitreous opacity, although it is difficult to determine the position of each layer of the retina by looking at each vertical pixel collected separately, but in a segment It is easier to distinguish on the scan

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