[Use of flat Frenel's lenses for increasing close-up visual acuity in persons with poor vision].
D005260:Female; D006801:Humans; D007909:Lenses; D012682:Sensory Aids; D014786:Vision Disorders / Q000628:therapy*; D014787:Vision Tests; D014792:Visual Acuity
Primenenie ploskikh linz Frenelia dlia povysheniia ostroty zreniia vblizi u slabovidiashchikh