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Hydrating case for moisture-containing lens and hydrating method using it

a technology of hydrating case and contact lens, which is applied in the direction of transportation and packaging, packaging goods types, other domestic objects, etc., can solve the problems of poor efficiency in elution of unreacted monomers, uneven water absorption and swelling, etc., and achieve the elimination of dust or contamination, the effect of effective extraction

Inactive Publication Date: 2005-06-16
MENICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] With the foregoing in view, it is an object of the present invention to provide a hydrating case of novel structure affording reduced curling and other non-uniform deformation of a moisture-containing contact lens during hydration of the moisture-containing contact lens, as well as enabling the hydrating process to be carried out in a consistent manner; and a novel hydrating method employing this hydrating case.
[0009] It is yet another object of the invention to provide hydrating case of novel structure affording reduced entrapment of bubbles during the moisture-containing contact lens hydrating process, whereby the moisture-containing contact lens can be induced to evenly absorb water and swell, and whereby unreacted monomer can be eluted efficiently; and a novel hydrating method employing this hydrating case.

Problems solved by technology

Once air has been entrapped by a moisture-containing contact lens, it is subsequently very difficult to remove it from the moisture-containing contact lens, and if the moisture-containing contact lens floats, this poses the risk of impairing uniform water absorption and swelling, as well as of poor efficiency in elution of unreacted monomer.

Method used

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  • Hydrating case for moisture-containing lens and hydrating method using it
  • Hydrating case for moisture-containing lens and hydrating method using it
  • Hydrating case for moisture-containing lens and hydrating method using it

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Embodiment Construction

[0079] In order to illustrate the invention more concretely, the embodiments of the invention are described in detail hereinbelow, making reference to the accompanying drawings.

[0080] A treatment case 2 for a moisture-containing contact lens is shown in FIG. 1 to FIG. 3 by way of a first embodiment of the invention. This case 2 has a recess 4 as a containment recess for containing the moisture-containing contact lens (3). In the description hereinbelow, as a general rule, the vertical direction in FIG. 3 shall be deemed the vertical direction.

[0081] More specifically, the case 2 structure has a rectangular top panel 5, and four leg portions extending integrally in the thickness direction of the top panel 5, i.e. downward, from the four corners of the top panel 5. In this embodiment, the top panel 5 has a square shape overall. In the generally central portion of the top panel 5 is formed a recess 4 that opens in the other the thickness direction of the top panel 5, i.e. upward. Thi...

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Abstract

The invention relates to a case for hydrating a moisture-containing contact lens in a dry condition, a hydrating device, and a hydrating method. A case (2) comprises a plurality of grooves (8) provided in the inside face (6) of a recess (4). A lens is placed in the case, a proper amount of a hydrating liquid is poured along the inside wall face of the recess (4) in the case in a first step. Then in a second step, a hydrating liquid is poured into the recess from above the case to allow the contact lens (3) to absorb water and swell. Accordingly, a wide extent of a lens front surface can come into contact evenly with the hydrating liquid in the first step, and the entire lens can be hydrated in the second step, whereby an efficient hydration is possible with lens curling and bubble entrapping prevented.

Description

TECHNICAL FIELD [0001] The present invention relates to a hydrating case for a moisture-containing contact lens and to a hydrating method using the same, and more particular relates to a hydrating case for eluting unreacted monomer from a moisture-containing contact lens in a dry condition, and bringing the moisture-containing contact lens to an equilibrium swelled condition that is as uniform as possible, and to a hydrating method therefor. BACKGROUND ART [0002] Typically, a moisture-containing contact lens is brought to finished product form by first fabricating a lens of the desired shape by various methods, and then subjecting it to a hydrating process and washing process in order to eliminate impurities such as unreacted monomer and the like. Treatment receptacles for carrying out. such hydrating / washing processes are disclosed in JP-A-7-113990 and JP-A-4-227643, for example. [0003] Specifically, the lens treatment receptacles taught in the publications cited hereinabove are fo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A45C11/00B29D11/00
CPCB29D11/00067A45C11/005
Inventor NAKAGAWA, MAKOTO
Owner MENICON CO LTD
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