Choroidal structural changes in different intermediate AMD patterns.

Abstract:

PURPOSE:To report variation of choroidal thickness (CT) and choroidal vascularity index (CVI) in subjects with drusen and subjects with reticular pseudodrusen (RPD) compared with healthy individuals using the Spectral-domain (SD)-Optical Coherence Tomography with enhanced depth imaging (EDI) system. DESIGN:A prospective, observational, cross-sectional study. SUBJECTS:Eighty-four participants. METHODS:The patients were imaged using the Heidelberg Spectralis device (Heidelberg Engineering, Heidelberg, Germany) with EDI mode. EDI-OCT images were exported and then imported into image analysis ImageJ software (National Institutes of Health, Bethesda) and a semiautomated algorithm was used for subsequent quantitative analysis. MAIN OUTCOME MEASURES:This study evaluated two choroidal parameters: (i) choroidal thickness (CT); (ii) choroidal vascularity index (CVI). RESULTS:CT analysis was performed in three different regions: (i) foveal region, (ii) parafoveal region; (iii) perifoveal region. All the analyzed regions were significantly decreased in RPD pattern, as compared with both the drusen group (p < .005) and healthy eyes (p < .005). CVI was significantly decreased in the RPD pattern, as compared with healthy eyes (p < 0.001). However, the drusenoid pattern did not have statistical significance in comparison with the control group suggesting the lower incidence of this pattern on choroidal vasculopathy. CONCLUSIONS:We report CT and CVI difference in RPD and drusen eyes. The RPD pattern seems to be a consequence of an alteration in the choroidal vascularity resulting in severe ischemia and excessive hypoxia inducing an increased risk of late AMD compared to the drusenoid pattern.

journal_name

Eur J Ophthalmol

authors

Viggiano P,Toto L,Ferro G,Evangelista F,Porreca A,Mastropasqua R

doi

10.1177/1120672121992009

subject

Has Abstract

pub_date

2021-01-28 00:00:00

pages

1120672121992009

eissn

1120-6721

issn

1724-6016

pub_type

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