Atypical Retardation Patterns in Scanning Laser Polarimetry Are Associated with Low Peripapillary Choroidal Thickness

作者：Tornow Ralf P^*; Schrems Wolfgang A; Bendschneider Delia; Horn Folkert K; Mayer Markus; Mardin Christian Y; Laemmer Robert

来源：Investigative Ophthalmology & Visual Science, 2011, 52(10): 7523-7528.

DOI：10.1167/iovs.11-7557

PURPOSE. Scanning laser polarimetry (SLP) results can be affected by an atypical retardation pattern (ARP). One reason for an ARP is the birefringence of the sclera. The purpose of this study was to investigate the influence of the peripapillary choroidal thickness (pChTh) on the occurrence of ARP.
METHODS. One hundred ten healthy subjects were investigated with SLP and spectral domain OCT. pChTh was measured in B-scan images at 768 positions using semiautomatic software. Values were averaged to 32 sectors and the total peripapillary mean. Subjects were divided into four groups according to the typical scan score (TSS) provided by the GDxVCC: group 1 TSS, 100; group 2 TSS, 90-99; group 3 TSS, 80-89; group 4 TSS, < 80.
RESULTS. Mean pChTh (+/- SD) in 110 healthy subjects was 141 mu m (+/- 49 mu m). There was a significant correlation between pChTh and TSS (r = 0.608; P < 0.001). In TSS groups 1 to 4, mean pChTh was 168 mu m (+/- 38 mu m), 148 mu m (+/- 48 mu m), 119 mu m (+/- 35 mu m), and 92 (+/- 42 mu m). Mean pChTh of TSS groups 3 and 4 was significantly lower than that of TSS group 1 (P < 0.001).
CONCLUSIONS. Low values of TSS resulting from the appearance of ARP in SLP are associated with low peripapillary choroidal thickness. Reduced choroidal thickness may result in an increased amount of confounding light getting to the SLP light detectors. (Invest Ophthalmol Vis Sci. 2011;52:7523-7528) DOI:10.1167/iovs.11-7557

• 出版日期2011-9