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Laser Scheimpflug videography.

H J Huebscher·D E Möller·T Seiler
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Abstract

Conventional Scheimpflug photography uses slits with a constant width of 80 microns. This parameter limits the resolution as sharp contours are imaged with a basic uncertainty. In order to reduce this basic uncertainty we developed an illumination slit with a width of 20 microns and less, using a green helium-neon laser (543 nm). With this slit, much sharper imaging of ocular contours can be achieved. Since this illumination is coupled to on-line videographic detection of the Scheimpflug image, any adjustment of the target is done under visual control at the monitor. Using this device, the slope of a densitogram of contrasted contours (for example the corneal surfaces) is steeper, which guarantees a more accurate detection of corneal thickness and curvature.

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CorneaDensitometryHumansLasersPhotographyVideo RecordingJournal Article

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H J Huebscher, D E Möller, T Seiler. 1996. Laser Scheimpflug videography.. https://doi.org/10.1159/000267967

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