Near-cornea circular annular multi-angle lighting device

Abstract

The invention relates to a near-cornea annular oblique multi-angle lighting device. The near-cornea circular oblique multi-angle lighting device comprises an optical system, wherein an annular obliquemulti-angle lighting device is arranged at the position close to eyes between the optical system and the eyes, an inclined angle is formed between the illumination light emitted from the annular oblique multi-angle lighting device and an imaging optical axis of the optical system, the light emitted from the oblique illumination device is used for observing cornea surfaces, cornea surface attachments ( a tear layer and tear surface lipid layers) and the like. The near-cornea annular oblique multi-angle lighting device is used for ocular surface checking optical systems (such as a slit lamp forthe department of ophthalmology, a corneal topography, a keratometer and the like), and illuminating rays of the device can basically cover the corneal surface. In order to increase the signal-noiseratio and reduce the noise, the rays which are oblique to the imaging optical axis of the optical system are used for illumination; in order to reinforce signals, the device is arranged at the position close to the eyes; and in order to decrease the circular signal dark area of a cornea center region, requirements that the illuminating angle for the cornea center from the perimeter region is largefrom small are met, and an annular illuminating body of a horn structure convex inner surface is adopted.

Description

technical field [0001] The invention relates to the field of special medical equipment, in particular to a near-cornea circular oblique multi-angle lighting device. Background technique [0002] The cornea is located on the surface of the eyeball and is transparent in texture. It is in direct contact with the outside world and is vulnerable to injury and infection. The surface of the cornea is observed, mainly using a slit lamp microscope, an ophthalmoscope, a corneal topography, and a keratometer. Observing the cornea with a slit lamp microscope can only cut the cornea through a narrow slit light and observe its cut surface. To examine the corneal surface with a slit lamp, it is necessary to dye the transparent corneal surface. The corneal surface is intervened by a dyeing medium, which will show the color at the injury or ulcer site, but it will also cover up other information on the corneal surface itself (such as tears, tears, etc.). membrane and the lipid layer on the...

AI Technical Summary

Problems solved by technology

To examine the corneal surface with a slit lamp, it is necessary to dye the transparent corneal surface. The corneal surface is intervened by a dyeing medium, which will show the color at the injury or ulcer site, but it will also cover up other information on the corneal surface itself (such as tears, tears, etc.). membrane and lipid layer on the tear film), and cannot observe transparent attachments on the corneal surface (such as the tear film and lipid layer on the tear film)

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