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368眼の眼圧を自動計測非接触眼圧計(NCT)で3回,ゴールドマン圧平眼圧計(GAT)で1回測定し,相関係数を算出した。GATによる平均値は13.5±2.6mmHgであった。NCTによる1回,2回,3回,平均値,最小値および最大値の全眼平均値はそれぞれ11.4±3.2mmHg,11.4±3.3mmHg,11.5±3.4mmHg,11.4±3.1mmHg,10.3±3.1mmHgおよび12.7±3.2mmHgで,いずれもGATの値より低かった(p<0.01)。GAT値との相関係数は第1回目0.567,2回目0.572,3回目0.565,平均値0.609,最小値0.595,最大値では0.591であり,既報の手動NCTの値より低かった。自動NCTを速やかに改善して,正確な眼圧が測れるようにすべきである。
Intraocular pressure (IOP) was measured in 368 eyes with an automated noncontact tonometer (NCT) repeated 3 times and by Goldmann applanation tonometer (GAT). Apparently healthy persons enrolled in health-check program served as test subjects. The IOP averaged 13.5±2.6 mmHg by GAT. IOP by NCT averaged 11.4±3.2 mmHg for the first measurement, 11.4±3.3 for the second and 11.5±3.4 for the third. Averaged IOP for three measurements by NCT averaged 11.4±3.1. The minimum and maximum IOP for each eye by NCT averaged 10.3±3.1 and 12.7±3.2. All these NCT values were significantly lower than those by GAT (p<0.01). Correlation coefficients between the GAT and the above five NCT values were 0.567, 0.572, 0.565, 0.595 and 0.591. They were lower than reported values by manually operated NCT values.
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