COLOURED CONTACT LENS BASED ON AMORPHOUS IMAGES Russian patent published in 2015 - IPC G02C7/04 

Abstract RU 2559313 C2

FIELD: medicine.

SUBSTANCE: method of obtaining transformed amorphous pattern, imitating iris, includes distortion of basic amorphous image, which does not belong to eye structure, by means of filters, reduction of obtained image opacity with obtaining light-permeable image, change of its size and application of notch-filter to create lens shape from adjusted in size image, forming on external diameter, in fact, round shape with remote smaller, in fact, round internal part. Method of manufacturing coloured contact lens includes covering cliche, carrying transformed amorphous pattern, with coloured ink, printing ink image from cliche on contact lens surface with formation of template by means of at least of rubber for printing, fixation of ink image, supply of lens-forming material into template cavity and its hardening, which results in detachment of coloured film from template surface and its formation of single piece with contact lens.

EFFECT: provision of natural and realistic appearance of coloured contact lenses even at very close distances.

14 cl, 1 tbl, 12 dwg

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RU 2 559 313 C2

Authors

Robert Kehri Taker

Lora Ehshli Krich

Dates

2015-08-10Published

2010-09-21Filed