中央角膜厚度对3种眼压计眼压测量值的影响

Influence of central corneal thickness on intraocular pressure measured with three tonometers

目的比较分析不同中央角膜厚度(central corneal thickness,CCT)下Icare回弹式眼压计、Goldmann压平式眼压计(Goldmann applanation tonometer,GAT)和动态轮廓眼压计(dynamic contour tonometry,DCT)的眼压测量结果,探讨CCT对3种眼压计测量值的影响。方法 对78例患者152眼分别用Icare、GAT、DCT3种眼压计进行眼压测量,并进行CCT的测量,对比不同CCT下3种眼压计的测量结果,分析眼压测量值与CCT的关系。结果 在全部受测者中Icare、GAT、DCT测得的眼压均值分别为(19.16±5.03)mmHg(1 kPa=7.5 mmHg)、(18.41±4.52)mmHg和(17.23±3.69)mmHg,三者之间有显著差异(F=7.256,P=0.001)。Icare和GAT的眼压测量值均与CCT显著相关(r=0.341,P<0.001;r=0.333,P<0.001),CCT每改变10μm,Icare的眼压值改变0.47 mmHg,GAT的眼压值改变0.41 mmHg;而DCT的眼压测量值与CCT无显著相关(r=0.032,P=0.699)。结论 Icare、GAT的眼压测量值均明显受CCT的影响,而Icare受CCT影响的程度较GAT的稍大,DCT的眼压测量值基本不受CCT的影响。

Objective To evaluate the influence of central corneal thickness （CCT） on intraocular pressure （IOP） values measured with Icare rebound tonometer （Icare） ,Goldinann applanation tonometer（GAT） and PASCAL dynamic contour tonometer（DCT）. Methods CCT and IOP were measured in 152 eyes of 78 cases. IOP measurement was performed on each eye with Icare, GAT and DCT. The IOP values with three tonometers under different CCT were compared, and the relations between IOP and CCT were analyzed. Results The mean IOP values measured with Icare, GAT and DCT were （ 19.16 ±5.03） mmHg（ 1 kPa =7.5 mmHg）, （ 18.41 ±4.52） mmHg and （ 17.23 ± 3.69 ） mmHg respectively. There was significant difference among [care, GAT and DCT （F = 7. 256,P = 0. 001 ）. IOP values detected with Icare and GAT had positive correlation with CCT （r =0. 341 ,P 〈0. 001 ;r =0. 333 ,P 〈0.001 ）. When CCT changed 10 μm, IOP of Icare changed 0.47 mmHg,the IOP of GAT changed 0.41 mmHg;While the correlation between IOP values of DCT and CCT was quite opposite （ r = 0. 032, P = O. 699）. Conclusions The IOP values measured with Icare and GAT show a significant dependency on CCT, whereas Icare is more dependent on CCT than GAT. IOP values measured with DCT shows no significant dependency on CCT.