scholarly journals Corneal Thickness Measurements With the Topcon SP-2000P Specular Microscope and an Ultrasound Pachymeter

1999 ◽  
Vol 117 (7) ◽  
pp. 868 ◽  
Author(s):  
Renee Bovelle
Keyword(s):  
Corneal Thickness ◽  
Thickness Measurements ◽  
Ultrasound Pachymeter ◽  
Specular Microscope

scholarly journals Determining the mean difference in central corneal thickness measured by applanation ultrasound and oculus Wavelight Occulyzer II

2021 ◽  
Vol 35 (3) ◽  
Author(s):  
Dr Ronak afza Memon ◽  
Dr munira Shakir ◽  
Dr Sahira Wasim
Keyword(s):  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Mean Difference ◽  
Topical Anesthetic ◽  
Cross Sectional ◽  
Anesthetic Agents ◽  
Department Of Ophthalmology ◽  
The Mean ◽  
Thickness Measurements ◽  
Ultrasound Pachymeter

Abstract Objective: The objective is to determine the mean difference of central corneal thickness measurements by using ultrasound pachymeter and oculus Wavelight Occulyzer II. Patients & Methods: This prospective cross-sectional comparative study was conducted at Department of Ophthalmology, Liaquat National Hospital, Karachi for 6 months duration, after the approval from ethical committee. Patients were included in our study on the basis of inclusion & exclusion criteria. Central corneal thickness measurements was taken by using ultrasound pachymeter & oculus Wavelight Occulyzer II. All the data was collected by single researcher. The results were plotted, compared & analyzed. Results: 130 patients attending ophthalmology department and fulfilling the inclusion criteria were assessed. One eye of each patient was measured (65 were right eye and 65 were left eye). 73(56.2%) were male and 57(43.8%) were females. Mean age of these patients was 33.9 ±8.9 years. The mean ± SD thinnest oculus Wavelight Occulyzer II measurement was 538.61±23.46 ?m and ranged between 476.0 and 619.0 ?m whereas the mean thinnest ultrasound pachymeter measurement was 535.1±21.816?m and ranged between 482 and 601 ?m. There was highly significant correlation of central corneal thickness between both the instruments. (r=0.96, p<0.001)  Conclusion: According to the results of our study there is a highly correlation of central corneal thickness was found between the readings obtained from both UP and oculus Wavelight Occulyzer II. So we concluded that oculus Wavelight Occulyzer II can be used as an alternative technique to ultrasound pachymetry while assessing CCT in clinical settings to  decrease the risk of procedure associated problems with UP like epithelial trauma and infection, to decrease the frequent use of topical anesthetic agents, for early detection and management of glaucoma & in anxious patients also. Keywords: Central corneal thickness, ultrasound pachymeter, oculus Wavelight Occulyzer II  

Agreement and repeatability of central corneal thickness measurements by four different optical devices and an ultrasound pachymeter

2018 ◽  
Vol 39 (7) ◽  
pp. 1589-1598 ◽  
Author(s):  
Nesrin Buyuktortop Gokcinar ◽  
Erhan Yumusak ◽  
Nurgul Ornek ◽  
Serap Yorubulut ◽  
Zafer Onaran
Keyword(s):  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Optical Devices ◽  
Thickness Measurements ◽  
Ultrasound Pachymeter

scholarly journals Comparison of Central Corneal Thickness Measurements Using Specular Microscope, Optical Biometer and Corneal Topographer

2021 ◽  
Vol 37 (3) ◽  
Author(s):  
Madiha Waseem ◽  
Mehvash Hussain ◽  
Muhammad Muneer Quraishy ◽  
Zaheer Sultan
Keyword(s):  
Correlation Coefficient ◽  
Healthy Subjects ◽  
Central Corneal Thickness ◽  
Pearson Correlation ◽  
Systemic Disease ◽  
Corneal Thickness ◽  
Pearson Correlation Coefficient ◽  
Optical Biometer ◽  
Thickness Measurements ◽  
Specular Microscope

Purpose:  To compare the Central Corneal Thickness (CCT) measurements by three different devices in normal eyes. Study Design:  Cross sectional observational study. Place and Duration of Study:  Dow University of Health Sciences and Dr. Ruth K.M. Pfau Civil Hospital, Karachi, from October 2020 to January 2021. Methods:  80 eyes of healthy subjects aged between 20 to 50 years were included in the study. Patients with corneal pathologies, systemic disease, history of ocular surgery or trauma, high intraocular pressure and high refractive error were excluded. Subjects underwent full ophthalmic examination. Central Corneal Thickness was measured by specular microscope (Shin-Nippon SPM-700; Rexxam Co. Ltd, Takamatsu, Japan), optical biometer (AL-Scan; Nidek, Gamagori, Japan) and corneal topographer (TMS-5; Tomey corporation, Nagoya, Japan). All data entry and analysis was done on SPSS version 23. For correlation among devices, Pearson correlation coefficient was used. Scatter plot was drawn for graphical presentation. Results:  80 eyes of 80 healthy subjects (50 males, 30 females) were recruited in the study by convenient sampling. The mean age was 37.76 ± 8.35 years. Mean Central Corneal Thickness values were 515.57 ± 31.54 µm, 510.21 ± 30.11 µm, 522.03 ± 29.78 µm with specular microscope, optical biometer and corneal topographer respectively. Measurements by these devices strongly correlate with each other using Pearson correlation coefficient (r = 0.927 to 0.966, p ? 0.001). Conclusion:  The results of Central Corneal Thickness measurements obtained from these three devices positively correlate with each other so any of these devices can be used for its measurement. Key Words:  Central Corneal Thickness (CCT), Specular microscope, Optical biometer, Corneal topographer.

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