FIELD: ophthalmology.
SUBSTANCE: ophthalmic lens comprises a contact lens, and one or more embedded structures that are sensitive to direction of incident light, which are embedded in contact lens. One or more embedded structures comprise holographic recordings that are detected only in transmitted light. Embedded tag can be used to distinguish normal from inverted lens, and as tag name, prescription tag or cosmetic enhancement agent.
EFFECT: technical result is ensuring invisibility of tag when lens is on eye.
11 cl, 24 dwg
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|---|---|---|---|
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|
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| LAYERED LIGHT CONTROL FILM UNIT | 1994 |
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| INVERSION MARKING OF CONTACT LENSES | 2013 |
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| USABILITY INDICATOR OF CONTACT LENSES | 2013 |
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| REPRESENTATION DEVICE (MODIFICATIONS) | 1995 |
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|
RU2677585C2 |
| HOLOGRAPHIC DEVICE FOR SHAPING AT LEAST FIRST AND SECOND ANGLE-SEPARATED LIGHT BEAMS AND IMAGE PROJECTOR USING THIS DEVICE | 1997 |
|
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