1 October 2003 Simple device for quantifying the influence of halos after lasik surgery
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J. of Biomedical Optics, 8(4), (2003). doi:10.1117/1.1607333
We present a simple device (called a halometer) to detect and quantify the phenomenon of halos after certain surgical procedures, such as refractive surgery. The task of the subject consists basically of discriminating, after dark adaptation, a small light source around a central high-luminance stimulus. The device, which is connected to a computer, provides a disturbance index to measure the effect of halos on the observer’s vision. Tested with normal subjects and patients after LASIK (laser in situ keratomileusis) surgery, this apparatus proved sufficiently sensitive to quantify the halos in subjects who had undergone surgery.
Ramón Gutiérrez, Jose Ramon Jimenez, César Villa, Juan Antonio Valverde, Rosario González Anera, "Simple device for quantifying the influence of halos after lasik surgery," Journal of Biomedical Optics 8(4), (1 October 2003). https://doi.org/10.1117/1.1607333


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