Function and Imaging Assessments for G1961E-associated Stargardt Disease

Function and Imaging Assessments for G1961E-associated Stargardt Disease: Outcome Measure Ranking as Basis for Interventional Trials

Some phenotypes of Stargardt disease are rather distinct. This includes the 'bull's eye maculopathy' phenotype associated with the frequent ABCA4 G1961E variant. In anticipation of a treatment trial, this natural history study aims to compare functional and structural outcome measures systematically.

Inclusion Criteria:

• Adult patients with G1961E-associated Stargardt disease
• Defined by (1.) the presence of two pathogenic ABCA4 variants with at least one ABCA4G1961E variant, (2.) a Stargardt disease phenotype, and (3.) the absence of pathogenic variants in PRPH2, PROM1, and ELOVL4

Exclusion Criteria:

• Inability to give informed consent
• 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)