PURPOSE Comparative analysis of central and peripheral corneal thickness in PEX patients using three different imaging systems: Pentacam-Scheimpflug device, time-domain optical coherence tomography (OCT) Visante, and swept-source OCT Casia. MATERIALS AND METHODS 128 eyes of 80 patients with diagnosed PEX were examined and compared with 112 normal, non-PEX eyes of 72 cataract patients. The stu...

PURPOSE To survey the standard keratoconus grading scale (Pentacam®-derived Amsler-Krumeich stages) compared to corneal irregularity indices and best spectacle-corrected distance visual acuity (CDVA). PATIENTS AND METHODS Two-hundred and twelve keratoconus cases were evaluated for keratoconus grading, anterior surface irregularity indices (measured by Pentacam imaging), and subjective refract...

PURPOSE This study evaluates the correlation between corneal densitometry and epithelial ingrowth (EI) after laser in situ keratomileusis (LASIK). METHODS Corneal densitometry of 3 patients who developed EI after LASIK was measured with the Oculus Pentacam. Corneal densitometry readings of each patient were obtained preoperatively and postoperatively after ingrowth was discovered. Densitometr...

ÖZ Amaç: Pentacam Scheimpflug sistemi, Topcon KR-8100P otokeratorefraktometre ve Lenstar LS900 biyometri ile ölçülen keratometri değerleri için cihazların uyumuna horizontal kornea çapının etkisini araştırmak. Gereç Yöntemler: Çalışmaya 78 olgunun 140 gözü dahil edildi. Çalışmadaki gözler, çapı <12 mm’den küçük olanlar (n=62, %44,3) grup 1 >12 mm (n=78, %55,7) 2 olmak üzere iki gruba ayrıldı. T...

To determine consistent change over time in keratoconus disease, it is necessary to establish progression cut-off values based on intersession variability of the device used monitor cornea. The aim this study was analyze accuracy corneal parameters using Scheimpflug tomography and anterior segment optical coherence healthy keratoconic eyes varying severity that indicate real progression. Three ...

snet.com/acover.wcs?entryid=076028 (accessed on Jan-

PURPOSE To assess the repeatability of Equivalent Keratometry Readings (EKRs) obtained by the Pentacam HR (high resolution) in untreated and post-LASIK eyes, and to compare them with the keratometry (K) values obtained by other algorithms. METHODS In this prospective study, 100 untreated eyes and 71 post-LASIK eyes were included. In the untreated group, each eye received 3 consecutive scans u...

REFERENCES AND LINKS [1] W. N. Charman, “The retinal image in the human eye”, in Progress in Retinal Research, Pergamon, Oxford (1983). [2] A. A. Atchison, G. Smith, Optics of the Human Eye, Butterworth-Heinnemann, Oxford (2000). [3] P. Artal, A. Guirao, “Contribution of corneal and lens to the aberrations of the human eye”, Opt. Lett. 23, 1713-1715 (1998). [4] A. Guirao, P. Artal, “Corneal wav...