Associations Between beta-Peripapillary Atrophy and Reticular Pseudodrusen in Early Age-Related Macular Degeneration

作者：Garg Aakriti; Blumberg Dana M; Al Aswad Lama A; Oll Maris; Yzer Suzanne; Forbes Max; Allikmets Rando L; Bearelly Srilaxmi^*

来源：Investigative Ophthalmology & Visual Science, 2017, 58(5): 2810-2815.

DOI：10.1167/iovs.16-20343

• age-related macular degeneration
• beta-peripapillary atrophy
• normal-tension glaucoma
• reticular pseudodrusen
• choroidal thinning

PURPOSE. Choroidal thinning has been associated with reticular pseudodrusen (RPD) and beta-peripapillary atrophy (beta-PPA), which have been linked to normal-tension glaucoma (NTG). This analysis sought to determine whether RPD are independently associated with beta-PPA in early AMD patients. Secondary outcomes included the association of RPD and preexisting diagnosis of glaucoma, cup-to-disc ratio (CDR), subfoveal choroidal thickness (SFCT), and IOP.
METHODS. This prospective cross-sectional study examined 78 age-and sex-matched early AMD patients: 43 RPD patients (63 eyes) and 35 non-RPD patients (64 eyes). Exclusion criteria included advanced AMD, high myopia, and vitreoretinal conditions/surgery. RPD and nonRPD groups were identified by confocal scanning laser ophthalmoscopy. beta-PPA as well as CDR were graded on digital, nonstereoscopic fundus photos. SFCT was measured on spectraldomain optical coherence tomography for 69 patients (35 RPD and 34 non-RPD). IOP and glaucoma diagnosis were extracted from charts.
RESULTS. beta-PPA had a greater prevalence in RPD than non-RPD (44% vs. 19%, P = 0.002); however, this relationship was not significant when SFCT was added to the model (P = 0.150). A preexisting diagnosis of glaucoma (P = 0.156), CDR (P = 0.176), and IOP (P = 0.98) was not different between groups.
CONCLUSIONS. RPD in early AMD are associated with presence of beta-PPA, but choroidal thickness is a confounder in this relationship. Because beta-PPA is a common finding in NTG, focusing on a potential shared pathway between RPD and NTG could improve the understanding of pathophysiology and expand therapies for each condition.

• 出版日期2017-5