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[Application of Icare rebound tonometer in children after congenital cataract surgery]
Yunping Li1, Songbai Jia, Ping Liu
1Department of Ophthalmology, Second Xiangya Hospital, Central South University, Changsha 410011; Research Center of Eye Disease, Second Xiangya Hospital, Central South University, Changsha 410011; Postdoctoral Research Station of State Key Laboratory of Medical Genetics, Central South University, Changsha 410078, China.
Insights
The Icare rebound tonometer (Icare RBT) is well-tolerated by children after congenital cataract surgery but tends to overestimate intraocular pressure (IOP) compared to Goldmann applanation tonometer (GAT). IOP measurement differences increase with central corneal thickness.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
Background:
- Accurate intraocular pressure (IOP) monitoring is crucial in children post-congenital cataract surgery.
- Goldmann applanation tonometer (GAT) is a standard but can be challenging in pediatric patients.
- The Icare rebound tonometer (Icare RBT) offers a potentially more accessible alternative.
Purpose of the Study:
- To compare IOP readings and tolerability between Icare RBT and GAT.
- To evaluate the utility of Icare RBT for IOP monitoring in children after congenital cataract surgery.
Main Methods:
- IOP was measured using Icare RBT and GAT in 150 children (262 eyes) post-congenital cataract surgery.
- Correlation and Bland-Altman analyses assessed agreement between instruments.
- Linear regression analyzed the influence of central corneal thickness (CCT) and age on IOP readings.
- Patient tolerance to both tonometers was surveyed.
Main Results:
- Mean IOP readings were 16.08 ± 5.72 mmHg (Icare RBT) and 14.17 ± 5.05 mmHg (GAT).
- A significant correlation (r=0.936, P<0.001) was found between Icare RBT and GAT readings.
- The mean difference (1.91 ± 2.04 mmHg) correlated with CCT (r=0.409, P<0.001).
- Icare RBT was better tolerated by children than GAT.
Conclusions:
- Icare RBT is user-friendly and well-tolerated in pediatric post-congenital cataract surgery patients.
- Icare RBT tends to overestimate IOP compared to GAT.
- The discrepancy in IOP measurements between Icare RBT and GAT increases with greater CCT.
Objective:
To compare the difference in intraocular pressure (IOP) readings as well as the tolerability between Icare rebound tonometer (Icare RBT) and Goldmann applanation tonometer (GAT), and to evaluate the application of Icare RBT in monitoring the intraocular pressure in children after congenital cataract surgery.
Methods:
The IOP was measured with the Icare RBT and GAT respectively in 150 children (262 eyes) after congenital cataract surgery by two experienced ophthalmologists. Correlation and Bland-Altman analysis were used to assess the agreement in IOP readings between the two instruments. The influence of the central corneal thickness (CCT) adjusted for age on IOP readings was analyzed by linear regression analysis. The tolerance of the patients to Icare RBT and GAT measurement were surveyed.
Results:
The mean age was (44.82 ± 11.56) months in 150 children, including 81 boys and 69 girls. The mean IOP readings by the Icare RBT and GAT were (16.08 ± 5.72) mmHg and (14.17 ± 5.05) mmHg, respectively. The mean difference between the Icare RBT and GAT was (1.91 ± 2.04) mmHg, which was significantly correlated with CCT (r=0.409, P<0.001). The IOP readings by Icare RBT was significantly correlated with that measured by GAT(r= 0.936, P<0.001). The 95% confidence interval of the difference between the two instruments was ?2.10 to 5.91 mmHg. The Icare RBT examination was well tolerated by the children compared to the GAT examination.
Conclusion:
The Icare RBT is easy to use and well tolerated by the children after congenital cataract surgery. Compared to GAT, the value measured by the IOPs trends to be overestimated. The difference in readings between the 2 tonometers will magnify with the increase in CCT.
