Inter-laboratory reproducibility of power measurement of toric hydrogel lenses using the focimeter and the Moiré deflectometer

Autor:	Ami Livnat, Tony Hough, Eliezer Keren
Rok vydání:	1996
Předmět:	Reproducibility Engineering business.industry Measure (physics) Replicate Moiré pattern Power (physics) law.invention Lens (optics) Optics law Inter-laboratory business Optometry
Zdroj:	Journal of The British Contact Lens Association. 19:117-127
ISSN:	0141-7037
DOI:	10.1016/s0141-7037(96)80004-8
Popis:	Two separate international ring tests were carried out to assess the measurement capability of the focimeter and the Moire deflectometer as applied to the power-related parameters of toric soft contact lenses. The results show that in order to measure the sphere and cylinder powers and axis direction using the focimeter a high number of replicate measurements are required to be confident of the test to within reasonable tolerance limits. The availability of the deflectometer provides lens manufacturers with measurement technology which is objective and reproducible and can be used to measure the power-related parameters of toric soft lenses with increased reproducibility using relatively few replicate measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::983b3cebd2948421a6abb2bee16635ef https://doi.org/10.1016/s0141-7037(96)80004-8 Zobrazit plný text záznamu Full Text from ScienceDirect