Jebmh.com Original Research Article J. Evid. Based Med. Healthc., pISSN- 2349-2562, eISSN- 2349-2570/ Vol. 4/Issue 56/July 13, 2017 Page 3430 CORRELATION OF INTRAOCULAR PRESSURE MEASUREMENTS WITH NON CONTACT TONOMETER AND GOLDMANN APPLANATION TONOMETRY Leya Sara George 1 , Arun Bhatti 2 , Nitin Batra 3 , Rupali Chopra 4 1 Postgraduate Resident, Department of Ophthalmology, CMC, Ludhiana. 2 Senior Resident, Department of Ophthalmology, CMC Ludhiana. 3 Professor and HOD, Department of Ophthalmology, CMC Ludhiana. 4 Professor, Department of Ophthalmology, CMC Ludhiana. ABSTRACT BACKGROUND A complete ophthalmologic examination includes intraocular pressure (IOP) measurement, which is a routine procedure and is important for diagnosis and monitoring of glaucoma. IOP measurement is most commonly done using Goldmann Applanation tonometer and Non-Contact tonometer. MATERIALS AND METHODS In this study IOP measurements of 500 eyes (glaucomatous and non-glaucomatous) were performed using GAT and NCT on patients visiting the outpatient clinic of Department of Ophthalmology at Christian Medical College and Hospital, Ludhiana. This was a cross sectional and observational study. Comparison of IOP values was done in different IOP ranges. CCT was measured and analysis of its correlation with GAT and NCT was done. RESULTS Both methods of tonometry correlated significantly in patients with IOP <24 mm Hg. The mean IOP measured by NCT, was 16.06 ± 5.85 mm Hg and the mean IOP measurement by GAT was 16.61 ± 6.94 mm Hg. Intraocular pressure readings with GAT and NCT positively correlated with CCT. CONCLUSION NCT may be useful for screening in clinical settings but borderline high IOP readings should be confirmed with GAT. Our findings, also suggest that CCT is an essential variable to consider in interpreting IOP readings. KEYWORDS Applanation Tonometer, Intraocular Pressure, Non-Contact Tonometer. HOW TO CITE THIS ARTICLE: George LS, Bhatti A, Batra N, et al. Correlation of intraocular pressure measurements with non contact tonometer and goldmann applanation tonometry. J. Evid. Based Med. Healthc. 2017; 4(56), 3430-3433. DOI: 10.18410/jebmh/2017/683 BACKGROUND Glaucoma is an optic neuropathy of multivariate aetiology wherein intraocular pressure (IOP) is the most important and only modifiable risk factor. Accurate IOP measurement has a very important role in diagnosis as well as management of glaucoma. 1 Newer techniques and devices for determining IOP have been developed, such as the Tono- Pen, the ICare Tonometer, Dynamic Contour Tonometry, TGDc-01 Tonometry and the Ocular Response Analyser. 2 Goldmann Applanation Tonometry (GAT) is still the gold standard for the measurement of IOP. Central corneal thickness (CCT) has been an important and confounding variable for IOP readings measured by both GAT and Non- Contact Tonometer (NCT). This study was done to compare intraocular pressure readings by NCT and GAT across different ranges of IOP and to correlate them with CCT. Aim To compare IOP measured with Goldmann Applanation Tonometer (GAT) and Non-Contact Tonometer (NCT) and to evaluate the correlation between intraocular pressure measured by these two instruments with central corneal thickness (CCT). MATERIALS AND METHODS This was a cross sectional study conducted in the Department of Ophthalmology at Christian Medical College and Hospital, Ludhiana. A total of 256 patients (500 eyes) attending the outpatient clinic of Department of Ophthalmology, were enrolled in this study. Written informed consent was obtained from all patients who participated in the study. Exclusion criteria were history of allergy to local anaesthetic, active ocular infection, subjects whose IOP could not be recorded due to any cause. Financial or Other, Competing Interest: None. Submission 03-06-2017, Peer Review 10-06-2017, Acceptance 23-06-2017, Published 13-07-2017. Corresponding Author: Dr. Nitin Batra, Professor and HOD, Department of Ophthalmology, CMC Ludhiana. E-mail: nbatra2001@gmail.com DOI: 10.18410/jebmh/2017/683