CN105629504A

CN105629504A - Contact lenses with water and oxygen channel

Info

Publication number: CN105629504A
Application number: CN201610175048.5A
Authority: CN
Inventors: 唐钰喜
Original assignee: Gan Sukang Is Depending On Reaching Scientific And Technological Group Co ltd
Current assignee: Gan Sukang Is Depending On Reaching Scientific And Technological Group Co ltd
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2016-06-01

Abstract

The invention discloses a pair of contact lenses with a water and oxygen channel. An inwards recessed tear channel with the width of 0.5-1.0mm is formed in the inner surface of the periphery of an optical region in the center of each lens; and small vent holes with the diameters of 0.5-1.5mm are formed in the tear channel. The pair of the contact lenses has the advantages that the small vent holes and the tear channel are combined to form a micro tear circulation system, so that the oxygen permeation and flexibility of the lens are ensured and the cornea anoxia is relieved; and the oxygen permeability of the lens can reach 15-20 times that of a pair of general hydrogel contact lenses and is 3-5 times that of a silicone hydrogel lens, so that the lens can be worn for continuous 3-5 days.

Description

A kind of contact lens with water oxygen passage

Technical field

The invention belongs to the structure design of contact lens, it relates to inside and outside a kind of tear, exchange contact lens easily.

Background technology

From 1971 take main raw as HEMA (hydroxyethyl methylacrylate) hydrogel contact lens come out since use till today always, due to its oxygen permeability not good (generally at 8-20DK), can not long periods of wear. Every day, wear time can not more than 12 hours, but it has superior wear comfort and snappiness, wore the time limit and can reach 1 year. Silicone hydrogel contact lens popular on current market substantially increases the oxygen permeability (3-7 being Common hydrogels contact lens is doubly) of eyeglass, but still very far away with not lenses fitted phase difference in the sensation of eyes. The main source of oxygen needed for corneal metablism is the oxygen dissolution in nature is cornea oxygen supply in tear, prevents the tear of cornea front surface to circulate after contact lens to a great extent. Silicone-hydrogel eyeglass is ion matrix, is easy to the macromolecular substance such as adsorbed proteins, lipid, its snappiness also not as hydrogel lenses, therefore its wear the time limit be generally one day or one week no longer than 30 days.

" high oxygen flow bandage type contact lens " patent of application number 200620045278.1 proposes perforate on eyeglass and increases the circulation of the tear inside and outside glasses, such perforate allows the tear in eyeglass flow to outside really, but exists for the serious shortcomings solving a problem and ignore the impact of other side. The eyeglass of this patent is all regional openings at whole eyeglass, it is known that, the central zone of eyeglass is Optical Region, and the specific refractory power of different substances is different, if the refractive power effect of Optical Region will certainly be affected at Optical Region open interior, causing blurred vision after lens wear, such eyeglass can not drop into practical application. Irregular perforate also can reduce the toughness of eyeglass, even if in addition only in non-optical zones perforate, tear also not easily flows back to face in eyeglass after outwards flowing out, and the oxygen-permeable of eyeglass improves little.

Summary of the invention

The object of the invention is to retain that Common hydrogels contact lens comfortable wearing, snappiness are good, to wear the time limit longer, on the basis of the not easily advantage of the macromolecular substance such as adsorbed proteins lipid, it is proposed to a kind of contact lens with water oxygen channel architecture.

The technical scheme of the present invention is: a kind of contact lens with water oxygen passage, and the internal surface in the periphery of center of lens Optical Region arranges the interior female tear passage that width is 0.5-1.0mm, and tear passage is opened the small ventilating holes that diameter is 0.5-1.5mm.

Preferably, described tear passage is in annular. Further, tear passage has 2-5 bar, separates by protruding ring between passage. Further, described protruding ring is in ring Zhou Shangwei sectional type, non-closed, and the tear intercommunication between tear passage, small ventilating holes is located between the termination of protruding ring and termination.

Preferably, described small ventilating holes has 3-8.

The invention has the beneficial effects as follows: small ventilating holes and tear passage combine and form the miniature tear recycle system, oxygen needed for supply corneal metablism, alleviates cornea anoxic, not only ensure that eyeglass oxygen flow but also ensured the snappiness of eyeglass. The oxygen-permeable of eyeglass of the present invention can reach 15-20 times of Common hydrogels contact lens, and the 3-5 being silicone-hydrogel eyeglass doubly, can wear 3-5 days continuously.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the one side that eyeglass of the present invention contacts with cornea;

Fig. 2 is the sectional view of eyeglass of the present invention;

In figure, 1-lens edge, 2-tear passage, 3-small ventilating holes, 4-protruding ring, 5-center of lens Optical Region.

Embodiment

As shown in Figure 1, 2, a kind of contact lens with water oxygen passage, the internal surface in the periphery of center of lens Optical Region 5 arranges the interior female tear passage 2 that width is 0.5-1.0mm, and tear passage 2 is opened the small ventilating holes 3 that 3-8 diameter is 0.5-1.5mm. Tear passage 2 is in annular, tear passage 2 is more wide, and to deposit tear more many, but wide words make eyeglass the thin layer of big area occur, eyeglass is perishable, for increasing more tear internal circulating load, if 2-5 bar tear passage 2, separate by protruding ring 4 between passage, the thickness of protruding ring 4 is identical with not establishing the common lens thickness of tear passage 2, does not occur the thin layer of big area like this.

Protruding ring 4 is in ring Zhou Shangwei sectional type, non-closed, and between the termination that small ventilating holes 3 is located at protruding ring 4 and termination, the tear intercommunication between such tear passage 2, moistens cornea faster.

Use the present invention, wearer when closing one's eyes due on the extruding of lower eyelid the tear in passage is discharged, owing to the snappiness of eyeglass self makes the fresh tear admission passage of oxygen carrier during eye opening, ensure inside and outside exchange and the molten oxygen of tear of the tear of cornea front end. Small ventilating holes and tear passage combine and form the miniature tear recycle system, such wearer will form tear circulation when independently or not independently closing order, oxygen needed for supply corneal metablism, alleviates cornea anoxic, has also ensured the snappiness of eyeglass while ensure that eyeglass oxygen flow.

Claims

1. one kind has the contact lens of water oxygen passage, it is characterized in that: the internal surface in the periphery of center of lens Optical Region (5) arranges interior female tear passage (2) that width is 0.5-1.0mm, and tear passage (2) is opened the small ventilating holes (3) that diameter is 0.5-1.5mm.

2. the contact lens as claimed in claim 1 with water oxygen passage, is characterized in that: described tear passage (2) is in annular.

3. the contact lens as claimed in claim 2 with water oxygen passage, is characterized in that: described tear passage (2) has 2-5 bar, separates by protruding ring (4) between passage.

4. there are the contact lens of water oxygen passage as claimed in claim 3, it is characterized in that: described protruding ring (4) is in ring Zhou Shangwei sectional type, non-closed, tear intercommunication between tear passage (2), between the termination that small ventilating holes (3) is located at protruding ring (4) and termination.

5. the contact lens as claimed in claim 1 with water oxygen passage, is characterized in that: described small ventilating holes (3) has 3-8.