Contact lenses

Abstract

The invention discloses contact lenses. Each of the contact lenses comprises a central part (2) of an optical area and a peripheral part (1) which surrounds the central part (2), wherein the diameter of the central part (2) is greater than that of a pupil; at least one coloured mark (3) is arranged on the peripheral part (1); and the mark (3) covers an iris of an eyeball after each of the contact lenses is worn. By the invention, the defects of the prior art are overcome; and the contact lens which is applied to a left eye can be distinguished from the contact lens which is applied to a right eye, and the contact lenses are easy to recognize.

Description

technical field [0001] The invention relates to a contact lens, in particular to a contact lens with a mark. Background technique [0002] Correct identification of contact lenses is important. Since most contact lens wearers have different prescriptions for both eyes, the power of the two contact lenses is often different. In addition, contact lens wearers can use the identification marks on the lenses not only as a means of distinguishing two lenses, but also as a means of distinguishing the two sides of one lens. For example, the markings can be used as an indication of when the lens is worn backwards to determine if the lens is properly placed in the eye (ie, the correct side is in contact with the eye), so the markings on the contact lens need to have a distinguishable Eyes and functions that are easily recognized by the user. [0003] Patent CN94192456.4 discloses a contact lens, which is a contact lens with at least one mark on one surface of its lens, and the mark...

AI Technical Summary

Problems solved by technology

[0006] (1) The marks are all sunken downwards. Combining with the existing technology, it can be seen that the formation of the mark is formed by laser, etc. technology, and the product manufacturing cost is relatively high;

[0007] (2) achieve the purpose of marking by producing a certain depth of depression, which has no color, that is, in the process of using, a myopic person is required to search for the light through light and dark as said in CN94192456.4 on a circle of 14mm diameter. Comparing the visible mark or the mark with a width of 300um in patent CN99115983.7, it is obvious that the marks mentioned in these two technical solutions are not suitable for users to observe, that is, they cannot distinguish between left and right eyes. and technical effects that are easily recognizable by the user

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