Tomey TMS-5, Instruction Manual

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1-9
[Absolute scale] : Absolute scale (ABS) uses the color coding developed by
Professor Stephan D. Klyce of Louisiana State University
(LSU).
It divides the range between 9 and 100 diopters into 26
sections, and allocates specific colors.
For all eyes measured, this scale shows the same refractive
power for all parts with the same color, thereby facilitating
comparison with other measurement results.
The center of the scale (normal range between 33.5 D and
50.5 D) is divided into 1.5 D intervals, centered around the
standard value for normal eyes (43 D), and colors ranging
from yellow to greenish colors are assigned.
Areas above and below the normal range are divided into 5.0
D intervals. Below the normal range, as the refractive power
gets smaller, the color becomes a progressively darker
shade of blue; while above the normal range, the color
changes from a reddish color to bright colors.
[Normalized scale] : Automatically assigns refractive powers according to the
analysis result of the patient’s eyes and applies colors in
Normalized scale mode (NRM).
For more detailed rendering of the shape, colors are applied
using a scale which only covers the range of refractive
powers of the measured eyes.
Normalized scale allows you to quickly identify the corneal
shape of each patient’s eye. Where the radius of corneal
curvature is small, warm colors are used; where it is large,
cool colors are used. That is, corneas with similar shapes
are mapped with similar colors, unless absolute refractive
powers are required.
The refractive power in Normalized scale mode is divided
into 11 equal intervals. If there is significant difference
between the highest and lowest refractive powers, then the
range represented by a single color will be large. Otherwise,
it will be small. The minimum interval is 0.4 D.