Comparison of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Air Puff Tonometer in Silicone Filled Eyes.

Document Type : Original Article

Authors

1 Department of Ophthalmology, Benha faculty of medicine, Benha University, Egypt.

2 Department of Ophthalmology, Benha faculty of medicine, Benha University, Egypt

Abstract

Background: To compare intraocular pressure (IOP) measurements in silicone filled eyes by Goldmann applanation tonometer (GAT) and air puff tonometer (APT). Aim: The purpose of this study was to evaluate the role of APT by comparing the measurements of IOP made using it with those made using a GAT. Methods: In this prospective comparative study, 40 eyes with silicone oil tamponade were included. IOP was measured by GAT and air puff tonometer at least 1 month from vitrectomy. Results: in eyes with silicone oil, IOP was 21.35±12.34 mmHg and 19.46±5.29 mmHg using GAT and APT, respectively (p>0.05)  and this difference was not statistically significant (p=0.074).  In addition, no significant correlation was detected between IOP measurements using both techniques and gender, and lens status. Conclusion: It seems that GAT provided higher IOP measurements by 3.34 mmHg (95% CI = 2.15 to 4.53 mmHg) on average compared with APT but the difference between the two IOP measurements was statistically non-significant (p >0.05), in silicone filled eyes. The further assessment of available methods for IOP measurement could possibly establish the most accurate technique for IOP estimation in silicone filled eyes.

Keywords

Benha Medical Journal
Volume 37, Issue 3
September 2020
Pages 667-677

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