Table 1.
Ocular, corneal, and internal Zernike coefficient mean changes [and standard deviations (SD)] of third, fourth, fifth, and sixth orders with the task, in the computer and paper groups, and the difference between their changes (computer change minus paper change)
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| Mean changes with the task (SD) (µ m) | <Difference between the changes of the computer and paper groups (µm) | ||||||||
| Computer | Paper | ||||||||
| Ocular | Corneal | Internal | Ocular | Corneal | Internal | Ocular | Corneal | Internal | |
| Z (3,–3) | 0.006 (0.024) | –0.006 (0.068) | 0.012 (0.063) | *0.026 (0.061) | –0.067 (0.229) | 0.051 (0.240) | –0.020 | 0.061 | –0.039 |
| Z (3,–1) | –0.017 (0.053) | 0.005 (0.005) | –0.021 (0.127) | *–0.021 (0.057) | *0.081 (0.227) | *–0.073 (0.226) | 0.004 | –0.077 | 0.051 |
| Z (3,1) | –0.014 (0.043) | 0.011 (0.085) | –0.025 (0.087) | –0.007 (0.032) | –0.002 (0.053) | *–0.080 (0.102) | –0.010 | 0.014 | *0.055 |
| Z (3,3) | –0.002 (0.026) | –0.044 (0.191) | 0.042 (0.179) | –0.010 (0.039) | 0.018 (0.125) | –0.025 (0.149) | 0.007 | –0.062 | 0.067 |
| Z (4,–4) | –0.003 (0.019) | –0.034 (0.185) | 0.031 (0.176) | –0.006 (0.029) | 0.008 (0.105) | –0.012 (0.111) | 0.003 | –0.041 | 0.042 |
| Z (4,–2) | 0.0015 (0.015) | 0.019 (0.086) | –0.017 (0.086) | 0.002 (0.0197) | 0.001 (0.052) | 0.001 (0.052) | –0.001 | 0.018 | –0.018 |
| Z (4,0) | –0.001 (0.026) | –0.012 (0.040) | 0.011 (0.049) | *–0.014 (0.030) | 0.022 (0.101) | 0.048 (0.100) | 0.013 | –0.034 | *–0.038 |
| Z (4,2) | –0.005 (0.022) | 0.001 (0.036) | –0.012 (0.037) | *0.010 (0.041) | –0.032 (0.128) | *0.037 (0.127) | *–0.014 | 0.039 | –0.049 |
| Z (4,4) | 0.001 (0.021) | 0.003 (0.048) | –0.003 (0.060) | *–0.016 (0.037) | *0.037 (0.127) | –0.063 (0.120) | *0.016 | –0.034 | *0.060 |
| Z (5,–5) | –0.004 (0.013) | *0.040 (0.077) | *–0.043 (0.079) | –0.001 (0.024) | –0.006 (0.088) | 0.007 (0.083) | –0.003 | 0.046 | –0.050 |
| Z (5,–3) | 0.002 (0.012) | *–0.017 (0.030) | *0.019 (0.035) | 0.003 (0.026) | –0.007 (0.072) | 0.009 (0.074) | –0.001 | –0.010 | 0.010 |
| Z (5,–1) | –0.006 (0.017) | 0.000 (0.025) | –0.006 (0.028) | –0.008 (0.023) | 0.011 (0.079) | –0.016 (0.077) | 0.002 | –0.010 | 0.010 |
| Z (5,1) | 0.001 (0.013) | 0.007 (0.025) | –0.006 (0.027) | *0.001 (0.013) | 0.001 (0.014) | –0.003 (0.022) | 0.000 | 0.006 | –0.003 |
| Z (5,3) | –0.001 (0.011) | –0.011 (0.072) | 0.010 (0.072) | 0.005 (0.016) | –0.012 (0.042) | *0.016 (0.048) | *–0.006 | 0.001 | –0.006 |
| Z (5,5) | 0.003 (0.011) | 0.008 (0.110) | –0.005 (0.110) | –0.002 (0.023) | 0.008 (0.086) | –0.013 (0.080) | 0.005 | 0.000 | 0.008 |
| Z (6,–6) | –0.001 (0.005) | 0.006 (0.061) | –0.007 (0.064) | –0.003 (0.012) | 0.004 (0.055) | –0.003 (0.057) | 0.002 | 0.002 | –0.003 |
| Z (6,–4) | 0.001 (0006) | –0.008 (0.040) | 0.009 (0.040) | 0.002 (0.012) | –0.004 (0.029) | 0.002 (0.034) | 0.000 | –0.004 | 0.007 |
| Z (6,–2) | –0.002 (0.005) | 0.004 (0.027) | –0.004 (0.029) | –0.000 (0.007) | 0.001 (0.019) | –0.001 (0.017) | 0.000 | 0.003 | –0.003 |
| Z (6,0) | –0.001 (0.006) | 0.002 (0.008) | –0.003 (0.009) | 0.003 (0.014) | –0.001 (0.032) | 0.002 (0.032) | –0.004 | 0.003 | –0.005 |
| Z (6,2) | 0.002 (0.006) | *–0.007 (0.011) | *0.007 (0.011) | –0.001 (0.015) | 0.001 (0.044) | –0.001 (0.039) | 0.001 | *–0.008 | *0.009 |
| Z (6,4) | –0.002 (0.007) | 0.015 (0.041) | *–0.016 (0.037) | 0.003 (0.013) | –0.004 (0.039) | 0.011 (0.039) | –0.004 | 0.019 | *–0.027 |
| Z (6,6) | 0.000 (0.007) | –0.018 (0.069) | 0.018 (0.068) | –0.001 (0.012) | 0.002 (0.062) | –0.010 (0.051) | 0.001 | –0.020 | 0.028 |
| *Statistically significant difference | |||||||||