title: [Accomodation tonus in myopia and its potential prognostic value].
abstract: 60 patients with different degree of myopia were examined to study habitual accomodation tonus (HAT) and accomodation rest tonus (ART). HAT was calculated as a difference between standard autorefratometer measurements before and after cycloplegia; HAT in open field (HAT-OF) was estimated using open-field autorefractometer before and after cycloplegia with a patient looking at the distant object; ART was considered as a difference between refraction in dark conditions (dark focus) and cycloplegic refraction using open-field autorefractometer Grand Seiko WR-5100K (Japan). In examined patients ART was maximal (-0,87 +/- 0,08 dpt) and HAT-OF-minimal (-0,15 +/- 0,04 dpt). The high values of accomodation tonus (both HAT and ART) were associated with higher rates of myopia progressing. For the first time dynamic refraction measured using open-field autorefractometer confirmed the phenomenon of "negative" accomodation.
authors: E P
authors: EP
authors: Tarutta
authors: N A
authors: NA
authors: Tarasova
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D006801:Humans; D009129:Muscle Tonus; D009216:Myopia / Q000503:physiopathology*; D011379:Prognosis; D014787:Vision Tests / Q000379:methods*