CN216365001U - Device for illuminating tear film lipid layer on surface of eye attached to ophthalmic slit lamp microscope - Google Patents

Abstract

An ocular surface tear film lipid layer illuminating device attached to an ophthalmic slit-lamp microscope comprises a slit-lamp microscope, wherein the slit-lamp microscope is provided with an ocular surface tear film lipid layer illuminating device which is positioned at the lower part of the eye of an observed person and used for illuminating the lower half surface of the ocular surface cornea of the eye of the observed person and observing the condition of the tear film lipid layer; the eye surface tear film lipid layer illuminating device comprises a connecting part and an illuminating body, wherein one end of the connecting part is connected with a left-right rotating mechanism, the other end of the connecting part is connected with the illuminating body, and a light source of the illuminating body is a surface light source; a left-right rotating mechanism is hinged on the slit lamp microscope optical body; a front-rear adjusting mechanism is attached to the left-right pivoting mechanism, and a dry eye device is attached to a sliding portion of the front-rear adjusting mechanism.

Description

Device for illuminating tear film lipid layer on surface of eye attached to ophthalmic slit lamp microscope

Technical Field

The patent relates to the field of special medical equipment, in particular to an eye surface tear film lipid layer illuminating device attached to an ophthalmic slit lamp microscope.

Background

The eye is the most important organ in human sense, and about 80% of the knowledge in the brain is acquired by the eye. The eyes are needed to read the books and recognize words, watch pictures, watch figures, enjoy beautiful scenery and the like.

A slit-lamp microscope (referred to as slit-lamp for short) is an important instrument which is not necessary but few in ophthalmologic examination, is also the first extensive basic instrument for ophthalmologic routine examination, and is required to be configured forcibly by industry countries such as ophthalmologic diagnosis and treatment, ophthalmologic health care, optometry fitting and the like.

Throughout the world, from the smallest otolaryngological clinic to the large eye hospitals to the top-grade eye disease research institutions, ophthalmic slit-lamp microscopes are the most specialized devices for examining the eyelids, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, lens and anterior 1/3 vitreous body to determine the location, nature, size and depth of lesions.

The ophthalmic slit-lamp microscope is widely used by medical institutions, ophthalmic health care institutions and spectacle chain stores, and the function expansion and improvement on the instrument play an important role in human eye health.

The structure of the slit lamp mainly comprises four parts: the device comprises a slit illuminating mechanism, a microscope optical body, a moving platform mechanism and a chin rest mechanism, wherein the slit illuminating mechanism and the microscope optical body are the most important.

The slit lamp is expanded in function and functional accessories are added, for example, a dry eye projection (lighting) device for dry eye (an ophthalmic disease) examination is added. The cornea projection (illumination) device for dry eye examination (hereinafter referred to as dry eye device) is attached to a slit lamp, and is placed between eyes and a slit lamp optical body during working, the optical axis of the dry eye device is superposed with the slit lamp imaging optical axis, and an operator illuminates the ocular surface (visible light and infrared light illumination) or projects an illumination graph (Placido ring and the like) on the ocular surface by using the device. The device is an optical projection device with a horn-shaped opening, and the angle of the light irradiating the eye surface is less than or equal to 15 degrees.

The tear film is a protective film that separates the cornea from the air on the surface of the human eye. The tear film is composed of three layers, the inner layer is mucin, the middle layer is tear fluid, and the outer layer is lipid layer. Wherein the lipid layer is generally non-uniformly, irregularly, and dynamically distributed over the surface of the tear film.

A human eye applies tears and a lipid layer to the ocular surface that secretes mucin by blinking to form a tear film. The tear film is broken in about ten seconds under normal state, and after a large number of tear films are broken, the tear film needs to be reconstructed by blinking; when the tear film is diseased, the rupture time can become rapid and the lack of tear film protection on the surface of the human eye and prolonged contact with air can cause discomfort, known as dry eye.

Dry eye is the most common and highly prevalent ocular surface disease. The disease incidence rate of the eye-protecting mask is 20-36% in China, the development trend of the eye-protecting mask shows an obvious growth trend due to the increase of eye-using frequency and the increase of eye-using time in recent years, and the eye-protecting mask has practical significance for the research of the disease on the health of human bodies.

Causes of dry eye disease are classified into: mucin problems, tear problems, lipid layer problems, wherein lipid layer problems cause dry eye, which is a lack of lipid layer or abnormal in quality, resulting in poor coverage of tear surface, premature rupture of tear film too quickly to evaporate, failure to lock water and cause dry eye.

The prior art uses slit lamps for dry eye ocular lipid layer examination, using Placido ring light or common visible light from an attached dry eye device for illumination of the ocular lipid layer. Examination of the ocular surface lipid layer using a dry eye device has the following disadvantages: a. the xerophthalmia device is an optical projection device with a horn-shaped opening, the effective irradiation part of the xerophthalmia device is arranged around the pupil of the eye, the irradiation area is small, and the actual condition of the whole ocular surface lipid layer cannot be completely reflected; b. the Placido circular ring light irradiated by the dry eye device with Placido circular rings interferes with the observation of the ocular surface lipid layer, and influences the observation effect; c. the light irradiated by the dry eye device is approximately vertical to the small-angle illumination of the ocular surface (the angle of irradiating the ocular surface is less than or equal to 15 degrees), optical signals can be interfered by reflected light noise of tissues which are not required to be observed and come from the back of the cornea such as the iris, the pupil and the like, and because the cornea and surface attachments (such as a tear film and a lipid layer on the tear film) are transparent, the interference noise is far stronger than the optical signals on the surface of the cornea (namely the signal-to-noise ratio is extremely low), the tear film lipid layer cannot be observed well at all, so that the interference is inhibited, the signal intensity is improved, and the aim of effectively observing the tear film lipid layer is fulfilled; d. the dry eye device is only about 20mm from the eye in the working position, and the short distance is inconvenient for the operator to turn over the lower eyelid with the hand.

SUMMERY OF THE UTILITY MODEL

This patent is to prior art's not enough, provides an eye surface tear film lipid layer lighting device of additional on ophthalmology slit lamp microscope, and specific technical scheme is as follows:

an ophthalmic slit-lamp microscope-attached illumination device for an ocular surface tear film lipid layer, comprising a slit-lamp microscope, characterized in that: a left-right rotating mechanism is hinged on the slit-lamp microscope optical body,

the left-right rotating mechanism is provided with an eye surface tear film lipid layer illuminating device which is positioned at the lower part of the eyes of the observed person and is used for illuminating the surface of the lower half part of the eye surface cornea of the eyes of the observed person and observing the condition of the tear film lipid layer;

the eye surface tear film lipid layer illuminating device comprises a connecting part and an illuminating body, wherein one end of the connecting part is connected with a left-right rotating mechanism, the other end of the connecting part is connected with the illuminating body, and a light source of the illuminating body is a surface light source;

a front-rear adjusting mechanism is attached to the left-right pivoting mechanism, and a dry eye device is attached to a sliding portion of the front-rear adjusting mechanism.

To better implement the utility model, the following steps can be further carried out: the light emitted by the light source of the illumination device for the tear film lipid layer on the surface of the eye is obliquely arranged relative to the direction of the axis of the eye, and the inclination angle is more than or equal to 20 degrees.

Further: the illuminating body comprises a semitransparent floodlight plate, a lipid layer illuminating device LED matrix lamp group and a lipid layer illuminating device outer cover, the lipid layer illuminating device LED matrix lamp group is arranged on the inner surface of the lipid layer illuminating device outer cover, and the semitransparent floodlight plate is arranged on the lipid layer illuminating device outer cover.

Further: the illumination light emitted by the LED matrix lamp group of the lipid layer illumination device is diffused by the semitransparent floodlight plate, converted into a soft and uniform surface light source and mapped to the lower half part of the cornea of the eye.

The beneficial effect of this patent does:

firstly, the illumination device irradiates the surface of the cornea with a larger inclination angle (the inclination angle is more than or equal to 20 degrees), so that the noise interference of transparent parts such as the iris behind the cornea is reduced, the noise is reduced, and the observation and imaging definition of the lipid layer on the surface of the eye is improved.

Second, the illumination device is positioned further from the eye in the working position than when illuminated with a dry eye device, facilitating the operator to view and flip the eyelid of the subject.

Thirdly, the high-quality picture obtained after the illumination of the ocular surface lipid layer by the illumination device is analyzed, the thickness of different parts of the ocular surface lipid layer can be accurately measured, then the average Lipid Layer Thickness (LLT) is calculated, and more accurate diagnosis conclusion can be conveniently obtained through the data.

Fourth, install compact structure on xerophthalmia device, during the use xerophthalmia device moves backward can not block lighting device's light, also can rotate to non-working position along with xerophthalmia device, does not influence the realization of other functions of slit lamp.

Drawings

FIG. 1 is a side view of the lighting device of the present patent;

FIG. 2 is a front view of the lighting device of the present patent;

FIG. 3 is a general schematic view of the present patent;

in the figure, reference numerals are illustrated for an eye 1, a dry eye device 2, a translucent flood plate 3, a lipid layer illumination device LED matrix lamp group 4, a lipid layer illumination device cover 5, a dry eye device front-rear adjustment mechanism 6 (front-rear adjustment mechanism), a dry eye device left-right rotation mechanism 7 (left-right rotation mechanism), a slit lamp microscope optical body 8, a lipid layer illumination device optical direction 9, and an eye axis direction (direction of the eye axis in front of the eye of an observer) 10.

Detailed Description

The following detailed description of the preferred embodiments of the patent, taken in conjunction with the accompanying drawings, will provide those skilled in the art with a better understanding of the advantages and features of the patent, and will make the scope of the patent more clearly and clearly defined.

As shown in fig. 1 to 3, an illumination device for the tear film lipid layer on the surface of the eye is mounted on the slit-lamp microscope optical body 8, and the illumination device is positioned under the eye 1 of the observed person; the light 9 emitted from the light source of the illumination device for the tear film lipid layer on the surface of the eye is inclined at an angle of 25-80 DEG with respect to the axial direction 10 of the eye (the direction of the axis of the eye in front of the front view of the eye to be observed).

Four groups of LED matrix lamp sets 4 are arranged along the inner wall of a lipid layer illuminating device outer cover 5, a semitransparent floodlight plate 3 is arranged on the lipid layer illuminating device outer cover 5, and the other end of the lipid layer illuminating device outer cover 5 is connected to an additional xerophthalmia device 2 on a slit-lamp microscope optical body 8. The semi-transparent floodlight plate 3 has the function of diffusing light rays of the LED matrix lamp group and converting the light rays into soft and uniform surface light sources, so that the irradiation surface mapped to the lower half part of the cornea of the eye is uniform and clear.

In this embodiment, the illumination device is fixed to the distal end of the rotating mechanism 7 of the dry eye device 2 attached to the slit-lamp microscope optical body 8.

A right-left rotation mechanism 7 is hinged to the slit-lamp microscope optical body 8, a front-rear adjustment mechanism 6 is attached to the right-left rotation mechanism 7, and a dry eye device 2 is attached to a sliding portion of the front-rear adjustment mechanism 6.

The slit-lamp microscope attached xerophthalmia device 2 can move back and forth for adjustment, and when the illuminating device is used, the slit-lamp microscope attached xerophthalmia device 2 retreats towards the slit-lamp optical body, so that the xerophthalmia device 2 cannot block the optical body 9 emitted by the illuminating device; when the illumination device is not used, the dry eye device 2 attached to the slit-lamp microscope can rotate leftwards (or rightwards) by more than 90 degrees and exit from the optical body imaging light path of the slit-lamp microscope, so that the realization of other functions of the slit-lamp microscope cannot be influenced.

The illumination light emitted by the LED matrix lamp group 4 is irradiated on the semitransparent floodlight plate 3 to form a surface light source, the surface light source is irradiated on the surface of the cornea in the lower direction of the ocular surface of the eye 1, the irradiated lipid layer mapping image of the ocular surface part is observed through the optical body, and the thickness of the lipid layer of the irradiated part is calculated through different colors of the image.

It will be evident to those skilled in the art that the patent is not limited to the details of the foregoing illustrative embodiments (e.g., mounted on a slit lamp optic body, or a slit lamp optic body coupling elbow, or other attachment means for a slit lamp optic body), but that the patent can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the patent being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. An ophthalmic slit-lamp microscope-attached illumination device for an ocular surface tear film lipid layer, comprising a slit-lamp microscope, characterized in that: a left-right rotating mechanism is hinged on the slit-lamp microscope optical body, an eye surface tear film lipid layer illuminating device is mounted on the left-right rotating mechanism, the eye surface tear film lipid layer illuminating device comprises a connecting part and an illuminating body, one end of the connecting part is connected with the left-right rotating mechanism, the other end of the connecting part is connected with the illuminating body, and a light source of the illuminating body is a surface light source;

a front-rear adjusting mechanism is attached to the left-right pivoting mechanism, and a dry eye device is attached to a sliding portion of the front-rear adjusting mechanism.

2. The ophthalmic slit-lamp microscope-attached illumination device for the lipid layer of the tear film of the ocular surface according to claim 1, wherein: the light emitted by the light source of the illumination device for the tear film lipid layer on the surface of the eye is obliquely arranged relative to the direction of the axis of the eye, and the inclination angle is more than or equal to 20 degrees.

3. The ophthalmic slit-lamp microscope-attached illumination device for the lipid layer of the tear film of the ocular surface according to claim 2, wherein: the illuminating body comprises a semitransparent floodlight plate, a lipid layer illuminating device LED matrix lamp group and a lipid layer illuminating device outer cover, the lipid layer illuminating device LED matrix lamp group is arranged on the inner surface of the lipid layer illuminating device outer cover, and the semitransparent floodlight plate is arranged on the lipid layer illuminating device outer cover.

4. The ophthalmic slit-lamp microscope-attached illumination device for the lipid layer of the tear film of the ocular surface according to claim 3, wherein: the illumination light emitted by the LED matrix lamp group of the lipid layer illumination device is diffused by the semitransparent floodlight plate, converted into a soft and uniform surface light source and mapped to the lower half part of the cornea of the eye.

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