Objective: To compare intraocular pressure (IOP) measurements in children 18 years of age and younger using rebound tonometry and applanation tonometry and the feasibility of using these techniques in children.
Methods: Literature searches of the PubMed and the Cochrane Library databases were last conducted in June 2012 and resulted in 43 citations, including citations not in English. Of these 43 citations, 4 studies met the inclusion criterion following full text review. A level of evidence rating was assigned to each study using criteria specifically developed for this assessment.
Results: No level I study was found in the literature search, and 2 level II and 2 level III studies were identified. Intraocular pressure was 2 to 3 mmHg higher using rebound tonometry compared with Goldmann applanation tonometry in the 2 level II studies performed in a clinic setting and in 1 level III study performed on children under general anesthesia. However, IOP was lower in 1 level III study in which noncontact applanation tonometry was compared with rebound tonometry. Bland-Altman plots showed that the difference in IOP for rebound versus Goldmann applanation tonometry increased as the IOP increased. The success rate for measuring IOP was markedly higher in children 3 years of age and younger using rebound tonometry compared with noncontact tonometry in 1 level III study.
Conclusions: Rebound tonometry seems to be a reasonably accurate instrument that allows the IOP to be measured in many children without using general anesthesia. More data are required to assess better how the differences between instruments vary with IOP measurement.
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