Zeri Fabrizio, De Cusatis Mario, Lupelli Luigi, Swann Peter Graham
Degree Course in Optics and Optometry, Department of Sciences - Roma TRE University, Rome, Italy; Vision Sciences Department, Istituto Benigno Zaccagnini, Bologne, Italy; School of Life and Health Sciences, Aston University, Birmingham, UK.
Degree Course in Optics and Optometry, Department of Sciences - Roma TRE University, Rome, Italy.
J Optom. 2016 Jul-Sep;9(3):182-8. doi: 10.1016/j.optom.2015.09.001. Epub 2015 Oct 21.
To investigate if the accuracy of intraocular pressure (IOP) measurements using rebound tonometry over disposable hydrogel (etafilcon A) contact lenses (CL) is affected by the positive power of the CLs.
The experimental group comprised 26 subjects, (8 male, 18 female). IOP measurements were undertaken on the subjects' right eyes in random order using a Rebound Tonometer (ICare). The CLs had powers of +2.00D and +6.00D. Measurements were taken over each contact lens and also before and after the CLs had been worn.
The IOP measure obtained with both CLs was significantly lower compared to the value without CLs (t test; p<0.001) but no significant difference was found between the two powers of CLs.
Rebound tonometry over positive hydrogel CLs leads to a certain degree of IOP underestimation. This result did not change for the two positive lenses used in the experiment, despite their large difference in power and therefore in lens thickness. Optometrists should bear this in mind when measuring IOP with the rebound tonometer over plus power contact lenses.
研究使用回弹眼压计通过一次性水凝胶（依他氟康A）隐形眼镜（CL）测量眼压（IOP）的准确性是否受CL正度数的影响。
实验组包括26名受试者（8名男性，18名女性）。使用回弹眼压计（ICare）对受试者的右眼按随机顺序进行眼压测量。CL的度数为+2.00D和+6.00D。在每片隐形眼镜上进行测量，并且在佩戴CL之前和之后也进行测量。
与不使用CL时的值相比，使用两种CL测得的IOP值均显著降低（t检验；p<0.001），但两种度数的CL之间未发现显著差异。
通过正度数水凝胶CL进行回弹眼压测量会导致一定程度的IOP低估。尽管实验中使用的两种正度数镜片在度数和镜片厚度上差异很大，但该结果并未改变。验光师在使用回弹眼压计通过正度数隐形眼镜测量IOP时应牢记这一点。
