Lighting device of excimer laser therapeutic machine

Abstract

A lighting device for excimer laser therapeutic apparatus features that the ultrahigh-brightness LEDs are arranged on a circle and the included angle between light beam of LED and vertical line is greater than 30 deg. It has the merits of both ring lighting and oblique lighting to judge if the eye axis is vertical and see pupil clearly.

Description

technical field [0001] The invention relates to an illuminating device of an excimer laser eye treatment machine. Background technique [0002] The excimer laser eye treatment machine is an ophthalmic medical device developed in recent years for the treatment of myopia and astigmatism. figure 1 shown), transmitted through a light-guiding fiber, and then irradiated by two projection mirrors to the oblique lighting system of the operating area. None of the reflected light can enter the doctor's eyes through the microscope, ensuring that the doctor can see the patient's pupils clearly from beginning to end during the operation, but it has disadvantages such as large volume, high heat generation, large power consumption, and short lifespan. The biggest disadvantage is that it does not have the ability to judge whether the patient's eyeball is vertical. [0003] Some foreign brands of excimer ophthalmic laser treatment machines have noticed this problem. They make the lighting ...

AI Technical Summary

Problems solved by technology

[0004] However, this ring lighting device still has a serious shortcoming, that is, when the patient's cornea is cut by a lamellar knife, and the corneal surface becomes not very smooth, it will produce diffuse reflection to the ring lighting, causing the doctor to see it in the microscope. The cornea is white, so it is difficult to determine the position of the pupil. The main reason for this problem is that the diameter of the ring illumination is small, and the angle between the light and the working axis of the machine is relatively small, and most of the reflected light can pass through. Microscope shot into doctor's eye, blurring vision

[0005] At present, there is also a dual lighting system in foreign countries, that is, the combination of circular lighting and oblique lighting. The circular lighting is used to judge the verticality of the eyeball, and the oblique lighting is mainly to enable the doctor to see the patient's pupils clearly from beginning to end during the operation. However, this dual-structure lighting device has obvious shortcomings. First, the structure is very complicated and the production cost is high. Second, the lighting system has different requirements in terms of luminous brightness. The brightness and darkness of the two independent lighting systems are mutually Influence, bring trouble to use

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