Table 8: Differences
between binocular summation of visual acuity with prismatic and non-prismatic
correction (∆BS) in both groups. Values at a distance represents count of
recognized ETDRS letters, values at near distances (∆BS near) are
recorded in decimal notation. The bold marked pairs vary at statistically
significant level p <
0.05.
|
Differences of BS of VA with prismatic
and non-prismatic correction |
|||||
|
After examination |
Mean values | Standard deviations |
Mann-Whitney U Test results (p) |
|||
|
At a distance (number of ETDRS letters) |
Differences in Group A |
Differences in Group B |
|||
|
BS (full
contrast) |
1.176 |
3.695 |
-0.471 |
2.154 |
0.118 |
|
BS (50%
contrast) |
0.294 |
1.929 |
-0.176 |
2.215 |
0.697 |
|
BS (25%
contrast) |
2.647 |
4.315 |
-1.000 |
1.871 |
0.000 |
|
BS (10%
contrast) |
1.765 |
2.969 |
-0.529 |
2.503 |
0.045 |
|
BS (sum of
all contrast levels) |
5.882 |
7.817 |
-2.176 |
5.318 |
0.002 |
|
At near
distances (decimal) |
|
|
|
|
|
|
BS
(minimum legible) |
0.059 |
0.081 |
0.012 |
0.034 |
0.018 |
|
After
30-day trial wearing |
Mean
values | Standard deviations |
Mann-Whitney
U Test results (p) |
|||
|
At a
distance (number of
ETDRS letters) |
Differences
in Group A |
Differences
in Group B |
|||
|
BS (full
contrast) |
1.000 |
4.213 |
-0.941 |
2.703 |
0.107 |
|
BS (50%
contrast) |
1.529 |
5.680 |
-0.059 |
3.363 |
0.554 |
|
BS (25%
contrast) |
2.059 |
4.867 |
-1.412 |
3.743 |
0.015 |
|
BS (10%
contrast) |
1.235 |
6.969 |
-1.000 |
3.279 |
0.189 |
|
BS (sum of
all contrast levels) |
5.824 |
14.943 |
-3.529 |
6.539 |
0.044 |
|
At near
distances (decimal) |
|
|
|
|
|
|
BS
(minimum legible) |
0.051 |
0.074 |
0.006 |
0.024 |
0.040 |