RU4466U1 - DEVICE FOR MARKING EYE CORNITAS - Google Patents

Abstract

A device for marking the cornea of the eye, comprising a housing and radial marking plates mounted on it, characterized in that at the ends of the radial marking plates additional marking elements are installed in the form of circular arcs and two symmetrically located and parallel marking plates mounted between two radial marking plates .

Description

DEVICE FOR REMOVING THE CORNER OF THE EYE

The utility model relates to: medical equipment, namely, to markers of the cornea of the eye, used during microsurgical operations on the cornea to correct myopia and myopic astigmatism.

A device for marking incisions during surgical correction of myopia and myopic astigmatism by the method of anterior dosed keratotomy is known (Tool kit for radial keratotomy, MNTK MG. Vneshtorgizdat. Edition. N P 906).

However, this set of markers is inconvenient when marking for radial tangential keratotomy, since in this case it is necessary to use radial markers and tangential keratotomy markers, which do not cover a number of combinations of the number of radial incisions and the distances between them when performing radial tangential keratotomy. In addition, when marking the radial tangential keratotomy, it is necessary to use three markers in series - for marking the actually radially directed lines, a circle that is the boundary of the central optical zone and tangentially directed lines. At the same time, it is difficult to center the marking of radial and tangential incisions relative to the top of the cornea, as well as to precisely orient them relative to the optically strong corneal meridian.

The technical problem solved by the invention is to increase the accuracy of centering of the marking of radial tangential incisions, expanding the possible options for marking the radial tangential keratotomy, reducing the number of actions when marking (simultaneous marking), shortening the marking time.

The specified technical problem is solved by the fact that a device for marking the radial tangential keratotomy is proposed by the instantaneous method, comprising a housing and radial marking plates installed on it, characterized in that additional marking elements are installed at the ends of the radial marking plates in the form of circular arcs and two symmetries

} Marker plates parallel to the middle and between themselves are marked, reinforced by the mead by two-radial razmetovoi plates.

The device includes 3 markers (Fig. 1-3). The device consists of a housing 1, marking plates 2, additional marking elements 3 in the form of circular arcs, additional marking elements 4 in the form of two symmetrically arranged and parallel to the mead marking plates mounted between two radial marking plates and a holder (not shown in the drawing).

The device includes 3 markers:

1. Radial tangential scribe on the holder (Fig. 1)

Gyuzhstvo rays -4

Tilt angle -40 degrees

The distance between the T-rays -5. 5 mm

T-beam length - 1.5 mm

Central optical zone -3. 5 mm

2. Radial tangential scribe on the holder (Fig. 1) Number of rays -4

The angle of the rays - 35 degrees The distance between the T-rays - 6. About mm The length of the T-rays - 2. About mm

Central optical zone - 3. 5 mm

3. Radial tangential scribe on the holder (Fig. 1) Number of rays - 4

Beam angle - 30 degrees

The distance between the T-rays - 6. 5 mm The length of the T-rays - 2. About mm

Central optical zone - 3. 5 mm

The proposed marker is used as follows.

1. Mark the direction of the optically strong corneal meridian according to ophthalmometry.

2.On the working edges of the selected marker, apply a 1% aqueous alcohol solution of brilliant green.

3. Impose blepharostat.

- 2 5. The patient is asked to fix his gaze on the luminous fixation point, and if not, on the microscope lens.

6. Having raised the scribe close to the cornea, position it so that the reflection of the fixation point is in the center of the scribe, or by combining the light guide hole of the scribe with the pupil. The middle radial marking plate is combined with a strong corneal meridian.

7. The scribe is pressed against the cornea, on the epithelium of which remains an imprint in the form of radially directed, tangentially directed lines of future cuts and two circular arcs corresponding to the boundary of the central optical zone.

The advantage of this scribe compared to others is that at the ends of the vertical scribe plates there are auxiliary scribe arcs of a circle. This improves the accuracy of centering the lines of future incisions relative to the top of the cornea. The presence of a perpendicular plumb allows you to increase the accuracy of the marking orientation perpendicular to the strong meridian. The use of a scribe allows you to reduce the duration of the operation, since the marking of the incisions occurs simultaneously with the marking of the central optical zone. In addition, the proposed marker allows you to cover a wider range of combinations of tangential keratotomy parameters. This will allow more effective use of tangential keratotomy in the surgical correction of mixed astigmatism from 0. 5 to 4. 5 diopters.

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The beginning Department for the Coordination of Inventive and Patent Licensing ItV, fAiJ A. A. Karavaev

Claims (1)

A device for marking the cornea of the eye, comprising a housing and radial marking plates mounted on it, characterized in that additional marking elements are installed at the ends of the radial marking plates in the form of circular arcs and two symmetrically spaced and parallel marking plates mounted between two radial marking plates .