These frequency bands entered a Badal optometer where they were separated by long-pass filters and directed along paths of different lengths. Using this setup, the researchers were able to capture ...

This article was originally published with the title “New Optometer” in Scientific American Magazine Vol. 42 No. 4 (January 1880), p. 54 doi:10.1038/scientificamerican01241880-54a ...

0 0 This article was originally published with the title “The Optometer Skiascope” in Scientific American Magazine Vol. 71 No. 13 (September 1894), p. 196 doi:10.1038 ...

This handheld instrument features microprocessor control and multiple data presentation options. The Model S471 optometer is a next-generation handheld instrument designed for laboratory or field ...

Designed and configured for all LED measurement requirements, UDT Instruments’ optometer features microprocessor control and three measurement data-presentation options: direct display ...

Described as “a stenopaeic slit refraction system in a binocular telescopic optometer calibrated to measure spherical and cylindrical refractive errors,” the device was used to measure ...