Impact of Density and Thickness on Iris Measured

Impact of Density and Thickness on Iris Measured by Sole Scheimpflug Analyzer Rossen Mihaylov Hazarbassanov, MD José Reinaldo da Silva Ricardo, MD Mauro Campos, MD Department of Ophthalmology, UNIFESP, Sao Paulo, SP, Brazil There is not financial interests of any authors regarding this study

Introduction The Pentacam (Oculus, Germany) is a commercially available camera based on the Scheimpflug principle. It provides anterior segment images of the eye. In addition, to a certain point, the system provides a density evaluation for a specific area drawn on the Scheimpflug image. The mean density, maximum density, and standard deviation in that area can be calculated [1]. It has been widely used to evaluate lens density [1 -3], keratoconic corneas [4], posterior grafts [5], intralenticular foreign body [6] and anterior chamber angle [7 -9]. However it has never been used to evaluate the iris density.

Purpose To compare the density and iris epithelium thickness measured with Scheimpflug camera among patients with bright and dark colored eyes.

Patients and Methods 20 eyes from 10 patients (brown eyes) and 20 eyes from 10 patients (blue& gree eyes) without pathology were included on our prospective nonrandomized observational study.

Results Comparative results: Statistical difference between groups were found (paired t test). Density and thickness of iris epithelium was hight for blue- green colored eyes group (p<0. 05).

Results

Conclusion It important to get in consideration the color of the eyes when is using Scheimpflug camera analyzer.

References 1. 2. 3. 4. 5. 6. 7. 8. 9. Kim, J. -S. , S. -H. Chung, and C. -K. Joo, Clinical application of a Scheimpflug system for lens density measurements in phacoemulsification. Journal of cataract and refractive surgery, 2009. 35(7): p. 1204 -9. Kirkwood, B. J. , et al. , Repeatability and validity of lens densitometry measured with Scheimpflug imaging. Journal of cataract and refractive surgery, 2009. 35(7): p. 1210 -5. Grewal, D. S. , G. S. Brar, and S. P. S. Grewal, Correlation of nuclear cataract lens density using Scheimpflug images with Lens Opacities Classification System III and visual function. Ophthalmology, 2009. 116(8): p. 143643. Miháltz, K. , et al. , Evaluation of Keratometric, Pachymetric, and Elevation Parameters of Keratoconic Corneas With Pentacam. Cornea, 2009. Scorcia, V. , et al. , Pentacam assessment of posterior lamellar grafts to explain hyperopization after Descemet's stripping automated endothelial keratoplasty. Ophthalmology, 2009. 116(9): p. 1651 -5. Grewal, S. P. S. , et al. , Role of scheimpflug imaging in traumatic intralenticular foreign body. Am J Ophthalmol, 2006. 142(4): p. 675 -6. Hong, S. , et al. , Detection of occludable angles with the Pentacam and the anterior segment optical coherence tomography. Yonsei Med J, 2009. 50(4): p. 525 -8. Uçakhan, O. O. , M. Ozkan, and A. Kanpolat, Anterior chamber parameters measured by the Pentacam CES after uneventful phacoemulsification in normotensive eyes. Acta ophthalmologica, 2009. 87(5): p. 544 -8. Kurita, N. , et al. , Potential of the pentacam in screening for primary angle closure and primary angle closure suspect. J Glaucoma, 2009. 18(7): p. 506 -12.