ACCURACY OF MEASUREMENT RESULTS ON SCHIOTZ TONOMETER TOWARDS GOLDMANN APPLANATION TONOMETER IN TYPE II DIABETES MELLITUS PATIENTS IN MOHAMMAD HOESIN HOSPITAL, PALEMBANG Oral Presentation - Experimental Study - Ophthalmologist

Abstract

Introduction & Objectives
The Goldmann Applanation Tonometer is now the most accurate gold standard compared to other
tonometers. IOP measurement errors using the Schiotz Tonometer can be caused by ocular rigidity,
where the IOP is read higher in eyes with higher ocular rigidity and vice versa. Type II Diabetes
Mellitus (DM) patients are at risk for increased ocular rigidity

Methods
This research is a cross-sectional study with a diagnostic test design regarding the accuracy of
intraocular pressure results on the Schiotz Tonometer against the Goldmann Applanation Tonometer
in type II Diabetes Mellitus patients with 35 research samples. The research was conducted at the
Mohammad Hoesin Hospital in Palembang from April 2022 – September 2022 until the sample size
was met

Results
Intraocular pressure (IOP) as measured by The average Goldmann Applanation Tonometer was 15.5
± 2.4 mmHg, with a Schiotz load of 7.5 grams the average was 16.2 ± 2.3 mmHg. Ocular rigidity
had a median of 0.0242 (0.0176 – 0.0341) From the results of this study the IOP examination with
the Schiotz Tonometer had a sensitivity of 92.9%, a specificity of 80.9%, a positive predictive value
of 76.5%, a negative predictive value of 94.4% and an accuracy value of 92.3% indicating a
statistically strong level of accuracy

Conclusion
The Schiotz tonometer has an accuracy rate of 92.3% in examining intraocular pressure using a load
of 7.5 type II diabetes patients which can replace the Goldmann Applanation Tonometer as the gold
standard if normal ocular rigidity is found