DE553843C - Method and device for the manufacture of adhesive glasses (corneal scleral shells) - Google Patents

Description

Method and device for producing adhesive glasses (corneal scleral shells) It has long been endeavored to have the weak-sighted, their eyesight through conically bulging or irregularly bulged cornea or similar ailments very much is severely weakened to help normal vision. Because with such ailments the glasses designed to restore normal vision with the eyeball have to move, so-called sticky glasses are used, which are placed directly on the eye be carried and move with it. Such glasses are so far once produced by grinding, on the other hand by free-hand blowing. The production Such thin, usually hardly 0.5 mm thick shells by grinding is very difficult, time consuming; Anyway, repolishing is still necessary in order to protect the shell to give the required smoothness. When making the shells by hands-free So far, bubbles have been used in two types of glass, a white glass for the eyeball and a clear crystalline lens inserted in the front part. But it is very difficult to make a suitable glass in this way, and manufacture remains more or less a coincidence. In addition, these types of bowls become larger with prolonged use strongly attacked by the tear fluid, the crystal lens becomes dull, and the white part becomes gray and unsightly.

The present invention relates to a method of manufacture of eye-catching glasses by blowing in shapes. Similar procedures are already in place known in which, for example, incandescent lamp bulbs their outer shape by blowing is given in forms. A procedure similar in nature is used. according to the present Invention used in the manufacture of corneal scleral shells. As a base material Acid-resistant crystal glass is used for the production of the bowls one z. B. over a Bunsen burner at its closed end to be processed adequately heated glass tube in a corresponding to the adhesive glass to be produced Mold or die is blown. This shape has two spherical sections, namely corresponds to one of the anterior portion of the eyeball and the other of the spherical protrusion the cornea. The front section of the blown-in hollow glass part is then inserted into same operation with the jet flame in for the melting of blow caps separated in a known manner. It can be used without further treatment.

The most significant advantage of the present method is that it is possible with the adhesive glasses blown into appropriate molds perform an optical accuracy, as it is when using glasses is common. The same glass can be made in a larger version in exactly the same way Number of pieces to be produced. When re-ordering, the doctor can always do the same again Glass preserved, especially since there is also an exact numbering in the cornea and Scleral sizes can be set for the glasses. The protrusion of the corneal part of the shells evens out the bumps in the cornea of the natural eye while at the same time the one introduced with the insertion of the bowls, adapted to the tear fluid Water and the tear fluid that still collects between the eyeball and the glass the missing anterior aqueous humor is replaced and held behind the shell by this becomes, a fact that does not apply to the freehand blown bowls. the new corneal scleral shells do not require regrinding to achieve the desired results Visual effect, since every shape has been precisely calculated for the required visual acuity and consequently necessary protrusion is chosen.

The method and apparatus for carrying out the method is shown on the accompanying drawings, for example.

Fig. I shows the half-shape with the blown-in end of a hollow glass body, while Fig.z shows the separation of the front part, which represents the desired shell, from the glass tube shows.

Figure 3 shows the finished corneal scleral shell.

The shape a is indivisible and consists of a suitable material, for example made of metal, porcelain or the like. The one corresponding to the shell to be manufactured Depression has a scleral part b and a corresponding to the human eye Cornea part c with spherical curvature. A piece of glass tube d is made using a bunsen burner or the like. Heated, closed at the free end and blown into the mold a. Yet before cooling, the blown body is removed from the mold and the front one Part separated in a known manner with a jet flame. This front part represents then the finished bowl. Variations of the glass type touch what has been described Procedure not unless the thought of corneal scleral shells is precisely prescribed To produce shape and size by blowing using an appropriate mold, is preserved.

Claims (2)

PATENT CLAIMS: i. Process for the production of hollow bodies from glass tubes by blowing out one closed end of this glass tube to form a spherical body and blowing in this spherical structure in a full or half shape corresponding to the final shape in its application to the production of eye-holder glasses (corneal scleral shells) by melting the lower, the shape of the human eyeball adapted part of the hollow glass body with the spherical curvature contained therein. 2. Half-mold for carrying out the process according to claim i with a curvature corresponding to the human eyeball and a arranged therein, the curvature provided in the adhesive glass corresponding spherical Deepening.