DEVICE FOR VISION CORRECTION Russian patent published in 1997 - IPC

FIELD: medical equipment. SUBSTANCE: device for vision correction has two opaque screens each having equidistant lattice of round holes which period and diameter of holes are chosen in accordance with degree of fault of focusing capability of patient's eye, distance from flat screen to patient's eye and illuminance conditions and fixture to hold opaque screens in front of patient's eyes, for instance, in the form of glass frame. Opaque screens can be manufactured flat and mounted for change of angular position with reference to planes of their symmetry which is oriented in parallel to vertical plane of symmetry of patient's face. Opaque screens are made from material absorbing or reflecting X-rays and SHF radiation in the form of substrate with absorber or reflector of X-rays and/or SHF deposited on one of its sides. Light transparent film with metallized coat which thickness provides for passage of luminous flux and reflection of radiation of higher frequencies can be deposited on to opaque screens with same purpose. Device is supplemented with two additional screens installed close to corresponding opaque screens manufactured from material letting radiation of visible range pass and absorbing ultraviolet radiation. Device can also be equipped with two flat mirrors anchored correspondingly on external sides of opaque screens for change of their angular position relative to planes of corresponding opaque screens. EFFECT: increased functional efficiency and reliability of device. 7 cl, 5 dwg