Article

Relationship between the retinal thickness of the macula and the difference in axial length.

Department of Ophthalmology, Nara Medical University, 840, Kashihara-Shi, Nara, Japan.
Albrecht von Graæes Archiv für Ophthalmologie (impact factor: 2.17). 05/2006; 244(4):498-501. DOI:10.1007/s00417-005-1146-5 pp.498-501
Source: PubMed

ABSTRACT The purpose of this study was to evaluate the relationship between the retinal thickness of the macula and the difference in axial length with A-scan ultrasonography (UD-6000) and partial coherence interferometry (IOLMaster).
In 38 eyes of 26 patients with macular edema (ME), we measured axial length using both instruments and the retinal thickness of the macula using optical coherence tomography (OCT). To compare the difference in axial length between both methods, the Wilcoxon signed-ranks test was used. In addition, the relationship between macula thickness and axial length difference was analyzed by Spearman's correlation coefficient.
There was a significant difference between axial-length measurements (p<0.001). In addition, the retinal thickness of the macula and the difference in axial-length measurements were positively correlated (correlation coefficient = 0.55, p=0.003).
The difference in axial length obtained by both methods was considered to be the difference in optical and acoustic reflection site. This study may suggest that IOLMaster is sufficient for measuring axial length in eyes with macular edema and reducing postoperative refractive errors.

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Keywords

26 patients
 
A-scan ultrasonography
 
acoustic reflection site
 
axial length
 
axial length difference
 
axial-length measurements
 
correlation coefficient
 
instruments
 
IOLMaster
 
macula thickness
 
macular edema
 
OCT
 
optical
 
optical coherence tomography
 
partial coherence interferometry
 
postoperative refractive errors
 
retinal thickness
 
Spearman's correlation coefficient
 
Wilcoxon signed-ranks test
 

Tetsuo Ueda