Abstract
An improved chromatic rotatable refraction test for simultaneous spheric and astigmatic refraction is described. Its new features are interposition of a bright yellow stripe between the conventional red and green fields and a pair of parallel test lines, which traverse vertically all colored fields. Thereby astigmatic errors become easily visible.
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References
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Shilo, S. A trichromatic test for spheric and astigmatic refraction. Doc Ophthalmol 43, 159–164 (1977). https://doi.org/10.1007/BF01569303
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DOI: https://doi.org/10.1007/BF01569303