Refractive changes following instillation of 0.5% tropicamide in myopic schoolchildren

Satoshi Hasebe, Manabu Miyata, Ichiro Hamasaki, Shyuhei Kimura, Jyunko Suemaru, Hiroshi Ohtsuki

Research output: Contribution to journalArticlepeer-review


Purpose: To establish a diagnostic criteria to detect spasm of accommodation in myopic school-children by instillating tropicamide ophthalmic solution. Cases and Method: This study involved 86 schoolchildren between 6 and 12 years of age. All were myopic, ranging from -1.25D to -6.25D. We used Mydrin P® which contains 0.5% tropicamide and 0.5% phenylephrine. Power of refraction was measured by subjective and objective means before and after intillation. Results: After instillation, myopia decreased by 0.17±0.32D when measured by red-green duochrome test and by 0.30±0.27D by infrared automated refractometer. Conclusion: In order to diagnose pseudomyopia with spasm of accommodation, the power of myopia measured by subjective refraction has to be reduced by more than 0.8 diopters, or 95% confidence interval observed in myopic schoolchildren.

Original languageEnglish
Pages (from-to)581-585
Number of pages5
JournalJapanese Journal of Clinical Ophthalmology
Issue number4
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Ophthalmology


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