FIELD: medical optics. SUBSTANCE: invention relates to optical devices for examining eyes and may be used for choice of sight correction means by subjective method. Lens is used made in the form of a vessel with immersion liquid, one of refracting surfaces of which is a transparent membrane changing its curvature under liquid pressure, refraction of lens changing smoothly depending on patient's sensations. EFFECT: increased patient's comfort when choosing spectacle lenses. 2 cl, 4 dwg
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