Goldmann applanation tonometers and their calibration errors
Journal Title: Medpulse International Journal of Ophthalmology - Year 2019, Vol 9, Issue 2
Abstract
Aim and Objective: To determine prevalence and variability of calibration errors in Goldmann applanation Tonometer’s. Methods: 53 Goldmann applanation tonometers were checked with standard calibration error check weight bar, by two independent observers and classified into 6 categories of ±0.5,±1,±1.5,±2,±2.5 and >±2.5 mmHg. Results: There were 30(57%),17(32%),1(2%),3(5%),0(0%) and 2(4%) with calibration errors of ±0.5,±1,±1.5,±2,±2.5 and >±2.5 mmHg respectively with good agreement between observers. Conclusion: Study showed significant calibration error prevalence and variability in tonometers. Further studies required to establish the frequency of calibration, and to evaluate the relationship between calibration errors and clinical errors in IOP measurement.
Authors and Affiliations
Gajanan D Channashetti
Keywords
Related Articles
- EP ID EP536235
- DOI 10.26611/1009928
- Views 93
- Downloads 0
Comparative evaluation of accuracy of manual CCC using Patwardhan capsular marker and manual CCC without marker
Modern cataract surgery aims at quality of vision with spectacle independence. Phacoemulsification surgery has already revolutionized the cataract surgery considering its small incision resulting into minimal surgically...
Comparative analysis of travoprost (0.004%) and bimatoprost (0.03%) on intraocular pressure in patients with open-angle glaucoma
Purpose: To compare the efficacy and safety of bimatoprost (0.03%) and travoprost (0.004%) in newly diagnosed cases of open angle glaucoma. Material and Methods: Newly diagnosed patients of open angle glaucoma were recru...
An analytical study on the epidemiology ofpterygium in a tertiary care centre
Aim: To study and analyse the epidemiology ofpterygiumin a tertiary care centre. Design: Cross sectional observational study. Materials and methods: The patients more than 20 years of age, with true pterygium attending t...
Study of correlation of retinal nerve fiber layer thickness and optic disc parameters with visual field changes in glaucoma suspects and diagnosed cases of primary open angle glaucoma
Background: POAG is a major worldwide health concern, because of its usually silent, progressive nature. It is one of the leading preventable causes of blindness in the world. Purpose: To study the correlation of retinal...
Bacteriological flora of conjunctiva among pregnant women
Background: Normal microbial flora of eye constitutes organisms which are present on eyelids and conjunctiva without causing any disease. Various factors alter the conjunctival flora such as, seasonal variations, tempera...