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Simple effects test results for visual acuity.
| Group | Visual acuity | (I) | (J) | Mean difference (I–J) | Standard error | Value of p | Lower limit | Upper limit |
|---|---|---|---|---|---|---|---|---|
| Experimental group | KVA | Pre-test | Post-test | −0.186 | 0.033 | 0.000 | −0.252 | −0.120 |
| UDVA | Pre-test | Post-test | −0.247 | 0.032 | 0.000 | −0.311 | −0.182 | |
| Control group | KVA | Pre-test | Post-test | −2.084 | 0.033 | 0.003 | 0.034 | 0.166 |
| UDVA | Pre-test | Post-test | 0.056 | 0.032 | 0.088 | −0.008 | 0.120 |
* Indicates significant difference (p < 0.05).
