Comparative Study of Anterior Chamber Angle and Depth Recorded with Pentacam and AS-OCT SD “Spectralis”
E. Pateras *
Biomedical Department, Course of Optics and Optometry, University of West Attica, Athens, Greece.
N. Morogiannis
Biomedical Department, Course of Optics and Optometry, University of West Attica, Athens, Greece. 2Biomedical Department, Course of Optics and Optometry, Greece.
*Author to whom correspondence should be addressed.
Abstract
Aims: To compare the anterior chamber angle values recorded by Pentacam and AS-OCT SD “Spectralis” (Heidelberg Engineering) and present the correlation between the two devices.
Sample and Study Design: A total of 50 patients were examined at the Private Ophthalmology Clinic O.M.M.A. Ophthalmological Institute. All participants volunteer to participate in this study where the data was kept anonymous. Patients aged 18-45 years without a pathological history were selected. All of them were emmetropes or with ametropia ranged ±0.75 D. There was no separation between hyperopic, myopic or emmetropic patients.
Place and Duration of Study: University of West Attica Dept Biomedical Science Course Optics & Optometry in collaboration with Private Ophthalmology Clinic O.M.M.A. during the period between January 2019 to October 2019.
Methodology: In this study, two basic structures of the eye are measured with the help of two devices of different principle of operation. Specifically, the study of the angle of the anterior chamber (ACA) as well as the depth of the chamber (ACD). The two devises are compared.
Results: The ACA for both devices had mean difference of -2,004° for the R.E. while the mean difference for L.E. was 1,986°. Pentacam arithmetic mean ACA (R.E.) was 37,638 ± 2,98° and AS-OCT “Spectralis” 35,766 ± 2,90° with Correlation coefficient 0,7063 (P<0,0001). Pentacam arithmetic mean ACA (L.E.) was 37,638 ± 2,98° and AS-OCT “Spectralis” 35,652 ± 2,79° with Correlation coefficient 0,7569 (P<0,0001). The ACD for both devices had mean difference of -0,3028 for the R.E. while the mean difference for L.E. was -0,2860. Pentacam arithmetic mean ACD (R.E.) was 3,5866 ± 0,20 and AS-OCT “Spectralis” 3,2838 ± 0,20 with Correlation coefficient 0,4201 (P=0,0024). Pentacam arithmetic mean ACD (L.E.) was 3,558 ± 0,21 and AS-OCT “Spectralis” 3,2720 ± 0,20 with Correlation coefficient 0,4023 (P=0,0038).
Conclusion: Values of ACA measured by Pentacam and AS-OCT “Spectralis” were similar within the sample population of normal eyes right and left (P<0,0001). ACD measured by Pentacam and AS-OCT “Spectralis” showed also similar results the sample population of normal eyes for the right eye (P=0,0024) and left (P=0,0038).
Keywords: Anterior chamber angle, AS-optical coherence tomography, Spectralis, comparison, Pentacam, aqueous humor, anterior chamber depth