Progression Rate of Pseudoxanthoma Elasticum-associated Choroidal and Retinal Degeneration

Inclusion Criteria: * Adult patients with Pseudoxanthoma elasticum according to the Plomp criteria or adult patients with a PXE-mimicking phenotype (angioid streaks and peau d'orange \[e.g., ENPP1 or GGCX-associated disease\]) * Best-corrected visual acuity (BCVA): ≤1.0 LogMAR Exclusion Criteria: * Inability to give informed consent * Claustrophobia * Prior surgery (other than anti-VEGF injections, cataract surgery, YAG laser capsulotomy, or laser retinopexy) that - according to the investigator's judgment - may affect visual function assessments (e.g., retinal detachment surgery, glaucoma filtration surgery, or a history of a corneal transplant in the study-eye) * Concurrent ophthalmic conditions in the study eye that (according to the investigator's judgment) may contribute to loss of vision, such as clinically significant opacification of the ocular media (corneal dystrophies, cataract), other retinal diseases, or disease of the optic nerve head and visual pathway (including amblyopia) * Major surgery planned or other events that (according to the investigator's judgment) could hinder follow-up examinations (e.g., knee replacement)