RU2110239C1 - Device for performing optic correction and training vision - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: device has optic members having zones with different characteristics and common separation line. Optical centers of the zones belong to the same horizontal plane. Zone separation line is positioned so that optic axis of an eye can move from zone to zone at any point in horizontal direction. EFFECT: enhanced effectiveness and continuous mode of eye training. 2 cl, 1 dwg

Description

 The invention relates to medical equipment and can be used in ophthalmology for optical vision correction, as well as in other fields of optical technology, for example, binoculars, microscopes, etc.

 Various devices for optical vision correction are widely known, in particular glasses with bifocal lenses having vertically located zones with different refractive indices (refraction) and a common dividing line, which significantly reduces the load on the accommodation - convergent eye apparatus when moving the gaze from a long distance near reading ("Rosenblum Yu.Z., Optometry. M: Medicine, 1991, p. 45-50).

 However, bifocal lenses cannot be used to train the accommodation-convergent apparatus for the prevention and treatment of functional visual impairments (accommodation spasm, presbyopia, myopia, binocular vision impairment, etc.), which reduces their functionality.

 A positive result that can be achieved by using the proposed technical solution is to expand the functionality of the device by providing training for the accommodation-convergent eye apparatus for the prevention and treatment of functional visual disorders.

 This result is achieved due to the design features of the device, namely, that the optical centers of zones having different characteristics are in the same horizontal plane, while the line of separation of the zones is located so that the transition from zone to zone at any point occurs horizontally. To reduce optical distortion during the transition from zone to zone (image jump), the optical centers of the zones are located on the same optical axis.

 The drawing shows a variant of the device for correcting vision in the form of glasses with optical elements in the form of lenses.

 The device contains a spectacle frame 1 with lenses 2 and 3 (for example, stigmatic). Each lens consists of two halves (left - 2L and ZL and right - 2P and ZP), interconnected along a vertical line 4 of the section. The average value of the refraction of the two halves of the lens corresponds to the amount of refraction of the patient’s eye, and the actual value of the refraction of each half lens has a deviation from the average value, which lies below the subjective sensitivity to changes in refraction. In this case, half-lenses 2L and ZL have a deviation from the average value in one direction, and 2P and ZP in the other. For example, for a patient with a refraction of both eyes -3 diopters, the left half lenses are performed with a refraction of -2.9 diopters, and the right half-lenses with a refraction of -3.1 diopters.

 To coordinate the location of the intersection points of the optical zones of the lenses with the convergence angle when looking into the distance and closer (when reading), the dividing line can be made with a deviation from the vertical (for example, a section of the dividing line 4 shown in dashed lines in the drawing).

 To eliminate the visible transition line on the surface of the optical element, the separation of zones can be performed in the form of sectors with a smooth change in refraction from zone to zone.

 The proposed technical solution, depending on the tasks set, can be performed using other optical elements, for example, prisms (training fusion reserves), perforated plates (training accommodation), color filters (treatment of dysbinocular amblyobinopia), etc., as well as in the form of combinations. If it is necessary to use bifocal glasses to achieve a similar effect, they can be performed by dividing the optical elements into zones both separately in the upper (for distance) or lower (for near) parts, and simultaneously in both parts.

 In order to reduce the range of optical elements, the device can be made in the form of interchangeable binocular or monocular nozzles on glasses.

 It is known that the examination of objects by a person occurs mainly when moving the gaze horizontally within the physiological angle of the gaze without turning the head (Rosenblum Yu.Z. Optometry. M: Medicine, 1991, p. 36). When using the device in the form of the proposed version of the glasses, the visual axis of the eyes periodically switch from one half of the optical elements to the other and vice versa. In this case, the “adjustment” of the accommodation - convergent apparatus, which provides a sharp image on the retina, occurs, but the patient does not feel the “image jump”, since the subjective sensitivity to image displacement is much lower than physiological (A. Vatchenko. Accommodation spasm and myopia. Kiev: Health , 1977, p. 55-60). As a result of this, when using glasses with optical elements of the proposed design, a continuous training process for the accommodation-convergent apparatus is carried out, which contributes to the effective prevention and treatment of functional visual disorders.

Claims (2)

 1. A device for optical correction and training of vision, containing optical elements, characterized in that the optical elements have zones with different characteristics and a common dividing line, while the optical centers of zones with different characteristics are in the same horizontal plane, and their dividing line is so that ensures the transition of the visual axis of the eye from zone to zone at any point horizontally.  2. The device according to claim 1, characterized in that the optical centers of the zones with different characteristics of one optical element are located on the same optical axis.