研究目的
To investigate changes in axial length, keratometry, and intraocular lens power measured by the IOLMaster in adults over a 6-month interval to improve biometry practice.
研究成果
There were no statistically significant differences in axial length, keratometry, or IOL power over a 6-month period using the IOLMaster, suggesting that routine remeasurement is unnecessary, though it may be required in some cases.
研究不足
The study used only the SRK-T formula for IOL power calculation without grouping patients by axial length, and the 6-month duration may have been insufficient to detect significant changes.
1：Experimental Design and Method Selection:
A nonrandomized prospective cohort study was conducted. The IOLMaster device was used to measure axial length, keratometry, and IOL power at initial examination and 6 months later. The SRK-T formula was employed for IOL power calculation, and statistical analysis used paired-sample t-tests.
2：Sample Selection and Data Sources:
90 eyes from 90 cataract patients aged over 18 years were selected from the outpatient clinic of the Department of Ophthalmology, King Chulalongkorn Memorial Hospital. Exclusion criteria included dense cataracts, history of eye surgery, and inability to fixate eyes.
3：List of Experimental Equipment and Materials:
IOLMaster device (version 5; Carl Zeiss, Jena, Germany) for measurements.
4：Experimental Procedures and Operational Workflow:
Measurements were taken without pupil dilation at the initial visit and after 6 months. Data on axial length, steepest and flattest keratometry, and IOL power were recorded.
5：Data Analysis Methods:
Data were analyzed using SPSS for Mac version 20, with paired-sample t-tests to compare means between the two time points, with statistical significance set at P<0.05.
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