Schiotz Scleral Intraocular Pressure Readings Predict Goldmann Applanation Readings Better Than Rebound Tonometry
| Autor: | Siddharth Dikshit, Sirisha Senthil, Chandrasekhar Garudadri, Nikhil S. Choudhari, Raghava Chary, Swathi Badakere, Rashmi Krishnamurthy, Mohammed Hasnat Ali |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Intraocular pressure Linear mixed effect model medicine.medical_specialty genetic structures Mean difference Tonometry Ocular 03 medical and health sciences 0302 clinical medicine Ophthalmology medicine Humans Intraocular Pressure business.industry Limits of agreement Goldmann Applanation Tonometer REBOUND TONOMETRY Middle Aged eye diseases Sclera Cross-Sectional Studies medicine.anatomical_structure Linear Models 030221 ophthalmology & optometry Female Ocular Hypertension sense organs Bootstrap confidence interval business 030217 neurology & neurosurgery |
| Zdroj: | Cornea. 38:1117-1123 |
| ISSN: | 0277-3740 |
| Popis: | PURPOSE To study the agreement between scleral intraocular pressure (IOP) measurements using the Schiotz, Icare, and Icare PRO tonometers versus Goldmann applanation tonometer (GAT) in eyes with nonscarred corneas. METHODS This cross-sectional study included 83 eyes of 55 subjects. The order of IOP estimation was the corneal GAT, followed by ICare, ICare PRO, and Schiotz on the corneal and temporal sclera. The agreement between different tonometers and the 95% limits of agreement (LoA) were assessed using Bland-Altman plots. The repeated measures correlation coefficient was calculated between GAT IOP and scleral Schiotz IOP, and the 95% confidence intervals were calculated by the bootstrap method. The linear mixed effects model was used (adjusted for both eyes of the subjects) to generate an equation to predict GAT IOP from scleral Schiotz IOP. The prediction model was validated with new data from 60 eyes. Statistical analyses were performed using "R" software (version 3.3.2). RESULTS Comparing the scleral IOP measurements, the mean IOP difference (95% LoA) was the lowest with Schiotz, underestimating by -1.21 mm Hg (7.32, -9.74). Both ICare and ICare PRO significantly overestimated GAT IOP: ICare, 24.6 mm Hg (53.2, -3.97); and ICare PRO, 21.56 mm Hg (52.9, -9.79). The correlation coefficient between scleral Schiotz and GAT IOP was 0.92 (95% bootstrap confidence interval: 0.89, 98). The derived predictive equation was (Equation is included in full-text article.). The mean difference between the predicted GAT IOP and the actual GAT IOP was 0.96 mm Hg with narrow LoA (+1.79, -3.71), validating the prediction model. CONCLUSIONS Among the tonometers tested, the scleral IOP measurements with Schiotz had the best agreement with the GAT although LoA were wide. The predictive equation may have great potential to predict GAT IOP from scleral IOP readings in eyes with scarred/prosthetic corneas. |
| Databáze: | OpenAIRE |
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