OM t of c.iii - Vision Research Coordinating Center - Washington ...
OM t of c.iii - Vision Research Coordinating Center - Washington ...
OM t of c.iii - Vision Research Coordinating Center - Washington ...
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1/1/2005 Chapter 8 Corneal Curvature and Topography page 8-21<br />
(15) Verify that “SAVE AND CONTINUE” is highlighted, then press enter.<br />
(16) Verify that “horizontal line” plot is displayed with no “spikes” or<br />
“waviness”, then press enter.<br />
(17) Verify that the dioptric plot is automatically displayed. Note: The plot<br />
should be in tangential mode and standard scale. If sagittal is indicated, press (Alt) + F1<br />
to change to tangential. If standard scale is not indicated, press (~) (tilda key) and select<br />
standard scale.<br />
(18) Verify that Ks and Kf are within specification listed in Table 8-3.<br />
(19) Press (Esc) twice.<br />
(20) Repeat steps 1-19 for remaining steel balls. Note: If the steel ball image has<br />
bad detection lines, go to “adjust parameter”, then change detection threshold to 8 and<br />
radius variance to 0.6 by pressing the page down key<br />
(21) Is system does not meet specifications, contact your Alcon representative for<br />
calibration service.<br />
Table 8-3.<br />
Steel ball<br />
Specification<br />
22.37 OR 22.38 ±5.5D<br />
35.43 ±1.5D<br />
47.24 ±1.5D<br />
85.04 ±4.5D
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