DE386770C - Process for the manufacture of contact glasses - Google Patents

Process for the manufacture of contact glasses

Info

Publication number
DE386770C
DE386770C DEW51832D DEW0051832D DE386770C DE 386770 C DE386770 C DE 386770C DE W51832 D DEW51832 D DE W51832D DE W0051832 D DEW0051832 D DE W0051832D DE 386770 C DE386770 C DE 386770C
Authority
DE
Germany
Prior art keywords
glasses
contact glasses
manufacture
contact
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEW51832D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss SMT GmbH
Original Assignee
Carl Zeiss SMT GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss SMT GmbH filed Critical Carl Zeiss SMT GmbH
Priority to DEW51832D priority Critical patent/DE386770C/en
Application granted granted Critical
Publication of DE386770C publication Critical patent/DE386770C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04Contact lenses for the eyes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00009Production of simple or compound lenses
    • B29D11/00038Production of contact lenses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00932Combined cutting and grinding thereof
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041Lenses
    • G02B1/043Contact lenses

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)

Description

Verfahren zur Herstellung von Kontaktbrillen. Die zahlreichen Nachteile der Brille, des Kneifers und des Einglases, selbst bei Verwendung der modernsten Vervollkommnungen, sind so offenkundig, daß die Idee, optische Augenfehler durch Einschaltung eines geeignet beschaffenen optischen Mediums zwischen Augapfel und Augenlid zu korrigieren, von vornherein eines erheblichen Interesses sicher ist. Die Ausführung dieser Idee verlangt ein Verfahren zur Herstellung solcher »Kontaktbrillen«, verwendbar für sämtliche Fälle von Augenfehlern, die durch gewöhnliche Brillen korrigierbar sind. Ein solches Verfahren ist das hier zu beschreibende.Process for the manufacture of contact glasses. The numerous disadvantages the glasses, the pince-nez and the single lens, even when using the most modern Improvements are so evident that the idea of optical defects through the eyes Insertion of a suitable optical medium between the eyeball and Correcting the eyelid is a priori of considerable concern. The implementation of this idea requires a process for the production of such "contact glasses", Can be used for all cases of eye defects that can be corrected with ordinary glasses are. One such method is that to be described here.

Man hat bisher nur bei einer verhältnismäßig seltenen Augenkrankheit (Keratokonus) mit Erfolgversucht, unmittelbar vor dem Augapfel eine gewölbte, dünne Schale aus geblasenem Glas anzubringen, um unregelmäßige Deformationen der Hornhaut in der Weise auszugleichen, daß man eine neue regelmäßige Vorderfläche schuf (Kontaktadhäsionsgläser der Firma F. A d. M ü 11 e r S ö h n e, Wiesbaden). Diese Gläser werden in vielen Fällen von den Patienten gut vertragen. Versuche, solche Gläser durch Schleifen in Linsenformen zu bringen, die zur Korrektur der häufigsten optischen Augenfehler und zur allgemeinen Einführung geeignet wären, sind an der Schwierigkeit und den hohen Kosten des Schleifens sowie an der Angreifbarkeit geschliffener Gläser durch die alkalische Tränenflüssigkeit gescheitert. Literatur dazu: S i e g r i s t, Klinische Monatsblätter für Augenheilkunde, Bd. 56, S. 4oo, igi6; E p e r o n, ebenda, Bd. 61, S. q.6o, igi8.So far, one has only had one relatively rare eye disease (Keratoconus) tried with success, an arched, thin one immediately in front of the eyeball Blown glass bowl to be attached to prevent irregular deformations of the cornea to compensate in such a way that a new, regular front surface was created (contact adhesion glasses of the company F. A d. M ü 11 e r Söh n e, Wiesbaden). These glasses come in many Cases well tolerated by patients. Try to make such glasses by grinding in lens shapes that correct the most common optical defects and would be suitable for general introduction are at the difficulty and the high costs of grinding as well as the vulnerability of cut glasses the alkaline tear fluid failed. Related literature: S i e g r i s t, Klinische Monthly sheets for ophthalmology, vol. 56, p. 4oo, igi6; E p e r o n, ibid, vol. 61, p. Q.6o, igi8.

Zur allgemeinen Verwendbarkeit wird von Kontaktbrillen gefordert, daß sie bei sphärischer Krümmung des mittleren Teils vor der Hornhaut für die verbreitetsten Augenfehler (Kurzsichtigkeit, Weitsichtigkeit, Astigmatismus, Star und anderes mehr) nicht zu teuer herstellbar sind und in graduierten Brillenkästen zum bequemen Verpassen angeordnet werden können.For general usability, contact glasses are required that with spherical curvature of the central part in front of the cornea they are most widespread Eye defects (nearsightedness, farsightedness, astigmatism, star and other more) are not too expensive to produce and in graduated glasses cases to be easily missed can be arranged.

Nach dem neuen Herstellungsverfahren sind diese Forderungen erfüllt. Der Fortschritt wird im wesentlichen dadurch erreicht, daß als Material nicht Glas, sondern Zellon, Zelluloid oder eine organische Substanz von ähnlichen mechanischen und optischen Eigenschaften gewählt wird.According to the new manufacturing process, these requirements are met. Progress is essentially achieved by the fact that the material is not glass, but cellon, celluloid, or an organic substance of similar mechanical nature and optical properties is chosen.

Die Ausgangsmasse bekommt durch Guß oder Pressung bei geeigneter Temperatur die erforderliche Gestalt einer Schale von der Größe der Vorderfläche des Augapfels und etwa i min Dicke. Diese wird darauf in ihrem verdickten Mittelteil durch Schleifen und Polieren auf die verlangte exakte Linsenform gebracht. Nötigenfalls läßt sich noch ein dünner Lacküberzug anbringen.The starting material is obtained by casting or pressing at a suitable temperature the required shape of a bowl the size of the front surface of the eyeball and about i min thickness. This is then in its thickened middle part by grinding and polished to the exact lens shape required. If necessary, can apply a thin coat of varnish.

Als besondere Vorzüge der so hergestellten Kontaktbrillen sind ferner zu nennen: i. Biegsamkeit, guteAnpassung und leichtes Haften am Augapfel, ohne ihn zu verletzen; 2. Unzerbrechlichkeit der Brille und zugleich mechanischer Schutz des Auges (Verwendung_ als Schutzbrille) ; 3. Geringe Schichtdicke des am meisten gewölbten Brillenteils vor der Hornhaut wegen des hohen Brechungsindex der Substanz; q.. Chemische Beständigkeit gegenüber der Tränenflüssigkeit.The contact glasses produced in this way also have particular advantages to mention: i. Flexibility, good fit and easy adherence to the eyeball without it to hurt; 2. Unbreakable glasses and at the same time mechanical protection of the eye (use as protective goggles); 3. Low layer thickness of the most curved part of the glasses in front of the cornea because of the high refractive index the substance; q .. Chemical resistance to tear fluid.

Claims (1)

PATENT-ANsPRÜciIE: r. Verfahren zur Herstellung von Kontaktbrillen, dadurch gekennzeichnet, daB Zellon, Zelluloid oder eine ähnliche organische Substanz durch Guß oder Pressung die Gestalt einer dünnen Schale erhält und durch Schleifen und Polieren auf die erforderliche Linsenform gebracht wird, so daB diese Schale als Kontaktbrille auf dem Augapfel durch ihren Linsenschliff den optischen Fehler des Auges korrigiert. a. Kontaktbrillenschale aus Zellon, Zelluloid oder einer organischen Substanz von ähnlichen. mechanischen und optischen Eigenschaften.PATENT CLAIMS: r. Process for the production of contact glasses, characterized in that cellon, celluloid or a similar organic substance by casting or pressing it is given the shape of a thin shell and by grinding and polishing is brought to the required lens shape so that this shell as contact glasses on the eyeball due to their lens cut the optical defect of the eye corrected. a. Contact glasses shell made of cellon, celluloid or an organic one Substance of similar. mechanical and optical properties.
DEW51832D 1918-12-14 1918-12-14 Process for the manufacture of contact glasses Expired DE386770C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW51832D DE386770C (en) 1918-12-14 1918-12-14 Process for the manufacture of contact glasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW51832D DE386770C (en) 1918-12-14 1918-12-14 Process for the manufacture of contact glasses

Publications (1)

Publication Number Publication Date
DE386770C true DE386770C (en) 1923-12-17

Family

ID=7604777

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW51832D Expired DE386770C (en) 1918-12-14 1918-12-14 Process for the manufacture of contact glasses

Country Status (1)

Country Link
DE (1) DE386770C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE877952C (en) * 1943-06-03 1953-05-28 Ludwig Schneider Dr Process for the production of adhesive shells from organic plastics
DE884422C (en) * 1949-03-29 1953-07-27 Mueller Welt G M B H Inst Fuer Process for the production of adhesive glasses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE877952C (en) * 1943-06-03 1953-05-28 Ludwig Schneider Dr Process for the production of adhesive shells from organic plastics
DE884422C (en) * 1949-03-29 1953-07-27 Mueller Welt G M B H Inst Fuer Process for the production of adhesive glasses

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